Diablo® III

BatBarrage: Updated

LIVE (v1.0.7.15295)

The mechanics:

Whenever you activate the skill, the game starts 2 counters. One for damage (damage ticks) and one for mana cost and stacks.

-> 1 stack does 270% damage, no matter what your aps is (the tooltip is misleading like crazy)
-> the initial damage tick occurs on frame 45 (3/4 of a second) after clicking the skill, no matter what aps
-> each subsequent damage tick takes 30 frames, no matter what aps
-> at 1.00 aps, 270% damage is dealt over 10 damage ticks
-> the number of ticks scales with aps; the higher the aps, the less total ticks you get (270% damage is applied faster - with less damage ticks, but always 270% total damage per stack)
-> as you can see from the tests I made, 4 ticks seems to be the lowest and 11 the highest number of ticks for one stack
-> overview of its duration (1 stack)
11 ticks = 1*45 + 10*30 = 345 frames = 5.75 sec
10 ticks = 315 frames = 5.25 sec
9 ticks = 285 frames = 4.75 sec
8 ticks = 255 frames = 4.25 sec
7 ticks = 225 frames = 3.75 sec
6 ticks = 195 frames = 3.25 sec
5 ticks = 165 frames = 2.75 sec
4 ticks = 135 frames = 2.25 sec

-> the game uses resource cost ticks - you get a periodical mana globe response
-> for example Whirlwind gives you a damage tick and a mana tick at the same time, Plague Bats has them separated
-> Plague Bats cost 49 mana per mana tick (1/2 of 98)
-> important note: reduced resource cost seems to only work at 50% (I bought a -12 helm and the tick cost changed to 46 mana per tick and not 43 mana per tick as it should) - this is a possible bug (?)
-> the initial mana tick occurs at frame 10 after skill activation (activation is frame 0)
-> each subsequent mana tick occurs at a (30/aps; rounded down) frequency
-> so for example at 1.00 aps, you get mana ticks at f10->f40->f70->f100 etc. as long as you channel the skill (hold down the button); at 1.50 aps a mana tick takes 20 frames, at 2.00 aps it takes 15 frames etc.
-> whenever the game checks for a mana tick - on the same frame - it also checks for damage stacks (another 270% damage on top of the previous); this means that you channel the skill and the game periodically checks for channeling and applies another damage stack

Note that it is possible to determine skill activation for most skills (the skill icon is blacked out) but it´s not possible to determine when exactly Plague Bats stops, which makes the "stack" research very difficult.

Sequence examples:

frame 0 is the skill activation, 740/740 max mana,
10-691 mana tick
15-695 mana regen (45 base regen rate is 4.5 mana each 6 frames on average)
21-700 regen
24-651 mana tick
27-655 regen
33-660 regen
39-664 regen
45-669 damage tick (458)
52-673 regen
57-678 regen
63-682 regen
69-687 regen
75-691 damage tick (597)

I stopped channeling after 2 mana ticks and got 458-597-597-597-587-129 damage ticks = 2965 total damage at 2.01 aps, which equals to 2 stacks (43 base weapon damage; 1179 int; 270% damage is 1484.919). At this aps, had I instantly stopped channeling (before the 2nd mana tick), I would´ve gotten 5 damage ticks for a total of 270% damage (1 stack), but with 2 mana ticks I got 2 stacks and 6 ticks.

Important note: At higher aps values, the mana ticks are so frequent that it´s impossible to stop channeling after the initial stack, so you´ll always get at least 2 stacks even if you click the skill once (this occured for me at 2.34 aps, 2 stacks was the lowest...at 2.01 it´s still possible to get only 1 stack with a short click).

Another sequence:
9-691 mana tick (1 frame earlier than usual)
10-695 regen
16-700 regen
22-704 regen
25-655 mana tick (16 frames instead of 14)
28-660 regen
34-664 regen
37-615 mana tick (12 frames instead of 14, but the average between the first two is 14)
40-620 regen
44-620 damage tick
47-624 regen
53-629 regen
59-633 regen
65-638 regen
73-642 regen
76-642 damage tick

Here I stopped channeling after 3 mana ticks. The total sequence was 478-1074-1074-1074-716-30 which equals to 3 stacks damage. The duration was prolonged by 1 damage tick just like in the first case.

Now my most recent test, 1.00 aps, 29 base weapon damage, 1062 int.
270% damage is 909.846

10-699 mana
40-682 mana
45-682 91 dmg
70-664 mana
75-664 182 dmg
101-647 mana
106-647 273 dmg
137-681 437 dmg

damage sequence = 91+182+273+437+291+582+364+364+364+309+218+127+36 = 3638 (4 stacks)

Here I channeled until after 4 mana ticks and got 4 stacks.

Now you might ask, is it possible to stack Plague Bats as much as you want? The answer is no, because each stack has its duration. I´m trying to figure out how the duration stacks but it gets more difficult the more stacks you have a not knowing when I actually stop channeling makes it even harder.

So far it seems as if the duration is prolonged depending on how fast you activate stacks (the higher the aps the lower the time between stack activations) in relationship with the constant damage tick frequency (30 frames).

Anyway, if you want to personally test how many stacks you´re able to achieve at your aps, run the following test.

-> get the lowest dps white weapon that has the same base aps as your usual weapon
-> unequip all minimum and maximum damage on your jewelry and off hand and also "adds x% to elemental damage" affix (boots, SoJ, tal rasha´s amulet etc.)
-> get a ring or amulet with +minimum damage (only +minimum)
-> add (calculate) the +minimum damage from jewelry to the minimum damage value of the white weapon - the resulting minimum damage has to be higher than the displayed maximum damage of that same weapon - if one jewelry piece isn´t enough, get more with min damage
-> unequip all crit chance and crit damage sources (crit values make it harder to identify stacks)
-> equip IAS pieces - exactly as many as usual (get some cheap blue gear)

Ready? Write down your new minimum weapon damage (this single value is your new base weapon damage) and your WD´s intelligence stat. Example:

I bought a white 1.00 aps 2h axe with 9-11 base weapon damage. Equipped an amulet with a +20 minimum damage affix, so my new base weapon damage is 9 + 20 = 29-11 = 29-29 (the game will use the new min as the new max if it´s higher). My WD´s intelligence in this case is 1062, which gives me a 1 + (1062/100) = 11.62 damage modifier.

29 * 11.62 = 336.98 damage (this is 100% weapon damage, autoswing)
1 stack of Plague Bats does 270% weapon damage so 336.98 * 2.7 = 909.846 total damage per Bat stack.

You go to act 1, MP0, use first waypoint to the old ruins and channel Plague Bats on one of the Zombies for a while. Record the damage using fraps or bandicam or whatever you like, view the video and get the sum of damage ticks. The sum of your ticks should be close to a multiplication of 270% damage you calculated earlier, depending on how many Plague Bats you managed to stack. This is how damage and skill mechanics are researched.

EDIT: here´s a quick reference list for those who don´t want to calc stuff themselves - how many frames it takes to stack some Plague Bats at chosen aps values

aps/stack - 2 - 3 - 4 - 5
0.900 - 43 - 76 - 109 - 142
1.000 - 40 - 70 - 100 - 130
1.090 - 37 - 64 - 91 - 118
1.180 - 35 - 60 - 85 - 110
1.200 - 35 - 60 - 85 - 110
1.308 - 32 - 54 - 76 - 98
1.400 - 31 - 52 - 73 - 94
1.526 - 29 - 48 - 67 - 86
1.652 - 28 - 46 - 64 - 82
1.778 - 26 - 42 - 58 - 74
2.000 - 25 - 40 - 55 - 70

frames / 60 = time in seconds, for example 82 frames / 60 = 1.37 sec. So if you use a ceremonial knife with one movement speed item and a WH, you´d check the 1.652 aps row and see that you need to channel Plague Bats for 1.37 seconds to achieve 5 stacks. If you check the first list in this post, you´d see that this aps gives you 6 ticks, which means # of stack times 270% damage should be dealt within the next 3 seconds after you stop channeling.

Data from the research:
0.90 aps = 11 ticks
0.936 aps = 11 ticks
0.981 aps = 10 ticks
1.00 aps = 10 ticks
1.07 aps = 9-10 ticks (4:6 ratio)
1.11 aps = 9 ticks
1.18 aps = 9 ticks
1.19 aps = 8 ticks
1.34 aps = 8 ticks
1.35 aps = 7 ticks
1.56 aps = 7 ticks
1.605 aps = 6-7 ticks
1.635 aps = 6 ticks
1.8408 aps = 6 ticks
1.8762 aps = 6 ticks
1.8939 aps = 5-6 ticks (5:5 ratio)
1.9293 aps = 5 ticks
2.004 aps = 5 ticks
2.016 aps = 5 ticks
2.235 aps = 5 ticks
2.265 aps = 5 ticks
2.280 aps = 5 ticks
2.310 aps = 5 ticks
2.340 aps = 5 ticks
2.370 aps = 5 ticks
2.430 aps = 5 ticks
2.505 aps = 5 ticks
2.520 aps = 4-5 ticks (1:10 ratio)
2.535 aps = 4-5 ticks (2:8 ratio)
2.550 aps = 4-5 ticks (3:7 ratio)
2.565 aps = 4-5 ticks
2.7612 aps = 4 ticks
2.9382 aps = 4 ticks
2.9736 aps = 4 ticks
3.0975 aps = 4 ticks
3.1683 aps = 4 ticks
3.2220 aps = 4 ticks

-> if the initial tick or another tick deals more than base damage due to game frame rate dropping, the last tick in the sequence is adjusted accordingly (the remainder of the sequence)
-> if you´re close to a breakpoint and one or more ticks deal more than base damage, the last tick in the sequence might be omitted because there´s no remainder that would validate another tick
Edited by Nubtro#2147 on 4/29/2013 6:20 AM PDT
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Liking the information pouring in so far. I can see some major build changes for my character if things make some sense. How does this all stack up with Life on Hit and Life Steal? Leans more heavily towards Life Steal?
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Nubtro you are a god amongst men, well done.
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Just curious, as I am going through some information and trying to price out gear that would fit this build.


Visage of Giyua : 6CC > Firebat -12 Mana > 75-80 AR > 185+ Intelligence > Mana Regen +14

Amulet : Tough to say...thought Mara's Kaleidoscope. Or Tal Rasha's Allegiance.

Shoulders : It's between Vile Ward's and crafting Archon Spaulders of Intelligence or Vitality.

Zunimassa's Marrow : Obvious as to why for me. Random rolls --- +Armor and +7 PUR. Some people might go with Tal Rasha's Relentless Pursuit for this build just for the Attack Speed.

Bracers : Lacuni Prower's with CHC.

Gloves : Tasker and Theo with CHC and CHD or craft up a pair. Up to user here.

Belt : The one and only.... The Witching Hour. Again I would try to pick up PUR here.

Pants : Sadly, Inna's Temperance is going to rock with attack speed here. I would attempt to get PUR on this slot, as well. I would also personally stick the highest Amethyst gem possible into those sockets. Some people might go with Blackthorne's Jousting Mail just for survivability.

Feet - Zunimassa's Trail... I can't think of a better boot alternative. Would attempt to get either All Resists or Armor for one Random roll, and PUR as the other. If comfortable with less PUR go with All Resists and Armor both on this slot to make up for some survivability.

L. Ring : Skull Grasp... This will also help with survivability as well as attack speed. Shoot for the best CHC or CHD you can get/afford here. I would say you could reduce the cost on your skill, or you could aim to use Spirit Barrage, in which case you would pick up the +% Damage modifier on this, or you could go with the CHC for Acid Cloud, which is the spell I will personally replace Spirit Barrage with.

R. Ring : Go for a Zunimassa's Pox here, so we can get our four piece set bonus. Aim for the best you can do, though it seems like AS / CHC and Average Damage will definitely be the go-to for this slot as per usual.

Weapon : This can vary pretty wildly. I assume that this particular build will have a lot of synergy with the higher attacks per second of a single handed weapon and Mojo. So my personal preference would be the highest DPS Manajuma's Carving Knife with 100% CHD and an open socket that you can afford.

Mojo : Lastly here is where I personally finish off the four piece Zunimassa's set bonus with a String of Skulls. Get the highest Average Damage > Intelligence > Elite Damage > Mana Regen and then if you use Spirit Barrage as this build originally intended, aim for the highest bonus you can get there. Seems like 10% CHC is the highest you can get here, and is very desirable. For the last random property it's really a toss up. Hope for %Life or perhaps Vitality. Some people might want a socket.

So, judging from my picks and ideas....... how far off am I from some kind of BiS type idea for this build? I was just curious, because I'm saving all this information for when I attempt to build it next week!
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Only reason I picked an MCK over an Echoing Fury or Black Weapon is because I simply don't want to plan a build over something with such an exotic price range. I'd rather just stick a Ruby into something half the price. Though, and I guess I might as well admit it now, an Echoing Fury would probably be just about perfect for this.
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Hopefully I'm not too frightfully far off on some of these ideas. I probably miss by a mile, and by no means do you have to stack as much Pickup Radius as I do. But I aim for 24% movement speed and about 20PUR as part of this build because, well, once you try it once, it's hard to go back!
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Again, the posts above this one are just my ideas of what might be a good example of some gear for the set. I'm sure there are plenty of alternatives to what I suggested.

I also kinda played with the build a little bit.




I did go out of my way to try and modify your build. I was just curious if the modifications I made break this build? Only reason I am asking and not testing is because I can't get on and test it myself.
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Maybe I should have just waited a few days to post all this stuff until more information was up. But I am very impressed with the build and the information already being posted about the breakpoints.
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Just for clarity, I take no credit for coming up with any of these ideas or anything. I'm just kind of throwing ideas around to see what people say so I can understand things a little better. I'm sure the original build is most likely superior in terms of how it works as opposed to the stuff I came up with.
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hurray for more info! boo for likely lift in price of associated gear!

i've been on the prowl for 6cc giyua and skullgrasp for a while now....

so if the damage stacks and the DoT ends quickly with higher as, why have spirit barrage at all? why not just spam bats onto everything all the time?
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04/06/2013 10:54 AMPosted by godofdun
Nubtro you are a god amongst men, well done.

+1. Effort and information shared is a real gift. Thank you.

Unzero - we'll chat gear when you get back on board.

But generally speaking, the only real piece of gear to get Bats up and running is the VoG. And yes, they're still very cheap. Rest of Doc just really needs to be 'solid'. Second bit of Bat gear only necessary if you go down the PtV route.
Edited by manvan#1853 on 4/6/2013 3:40 PM PDT
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... or if you're stacking ias, i would think.

i have a vog and skull grasp. i reckon i would need a mana regen knife or even a mara's before i could take up ptv.
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Just curious, as I am going through some information and trying to price out gear that would fit this build.


Visage of Giyua : 6CC > Firebat -12 Mana > 75-80 AR > 185+ Intelligence > Mana Regen +14

Bought my VoG for 80M gold. Saw a similar VoG with 5.5CC sell for 20M.
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Got a low crit VoG if somone wants to borrow to try the build. Hit me up here or in game.
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there's a 14/12 & 5cc one on there right now. tempted to buy it, but 0.5% crit damage for just about all my gold doesn't seem good enough right now...
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It is a DOT....holy crap I never realized that. About time we try something new.

Edit: Hopefully we can get the OP cleaned up :)
Edited by rockon87#1616 on 4/7/2013 11:26 AM PDT
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This is fun.

Good to see some creative guide-writing being done again over here.

Was getting tired of watching Jimbob repeat himself on how to upgrade everyone's DPS...
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He will, he writes some pretty amazing stuff. Eventually I am sure he will approach it from a different angle but until we find out more and get a better idea of how the whole thing works, I would give him time to do research and get some playtime in so he can understand it well enough to do the kind of write up that you are talking about.
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I just think it's funny I watch WWE Wrestling and Bat Barrage makes me think of Wade Barrett and his Barrett Barrage. I keep thinking of that and have no idea why. Haha.
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Trying it out now on MP10 but just cant seem to make it effective. Suppose to apply the DoT and then cast WoS right? Just not enough damage even with PtV.

Not to mention WoS just sucks for farming but is great for PVP or Ubers where there is only a Single Tgt. Fitting in Acid Cloud doesnt seem to work out either.

Obviously more work to do.
Edited by rockon87#1616 on 4/7/2013 11:42 AM PDT
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