* Using Bul-Kathos's Sacred Charge (1.51 attack speed) and a shield.. for simplicity of calcs :P
* Bash with Instigation Rune -- 6+6 fury per attack
* Weapons Master passive skill -- +3 fury per attack w/ might weap (see Bul-Kathos)
* Animosity passive skill -- +10% fury generated
Here's how I see it panning out:
* Cast WotB
* Attack using Bash
-- ((12+3)*1.1) = 16.5 Fury generated for attack;
-- With attack speed 1.51 and WotB active, you make (1.51*1.25) = 1.89 attacks per second;
-- 16.5 fury * 1.89 attacks per second = 31.14 Fury Per Second.
If you had other gear equipped that increase the fury you generate or your attack speed, that number could go up. In any case, you should make more than 25 fury per second, which is enough to keep WotB going. I feel like you could also pad that using War Cry w/ Charge rune, so you generate 60 fury every 30 seconds, effectively 2 fury per second. This might be useful if you end up having to run to mobs and are unable to attack for 1-3 seconds, you can extend yourself at least 2 seconds by casting War Cry.
I don't think Frenzy will work. You just don't produce enough Fury per hit. I didn't factor in the first 4 attacks to rev up to full stack for simplicity of calculations, but I don't think it works even at full stack, anyway!
* Attack using Frenzy (assuming full stack)
-- ((3+3)*1.1) = 6.6 Fury generated for attack;
-- With attack speed 1.51, WotB active, full Frenzy you make (1.51*(1+(0.25+0.75))) = 3.02 attacks per second;
-- 6.6 fury * 3.02 attacks per second = 19.93 Fury Per Second.
I don't see anything wrong with ~20 fury per second because look at it like this:
We know the original WotB duration is 15 seconds.
If we did 20 FPS that would mean we generate 300 fury during the WotB 15-second duration. Divide 300 by 25 and we get 12. Obviously since 25 times 80% is 20, and 15 times 80% is 12. So basically with 20 FPS we keep losing 20% duration in each 'cycle', so we have this multiplicative pattern (multiply every cycle by .8):
(not gonna bother with continuing this pattern to infinity, stopping at ~1 sec is good)
The sum of this pattern is 74.02255939584.. so we have a duration of 74 seconds. Now let's just be real here, I did not intend for WotB to be for clearing trash mobs, I intended to use it on a really hard champion or a boss where they should be in a reasonable position and you can keep hitting on them (teleporter mobs are not good for keeping up WotB duration). I would think after 60 seconds they'd be dead...
Though, I think I'll have to try out Bash with the +6 fury rune, but in the end I really do want Frenzy, so I guess we'll have to see how it all pans out.
But hmm... but my major question hasn't been answered yet and I don't know if anyone can except Blizzard:
The thing is, I only have Seismic Slam in there because I don't know if you have to literally generate 25 fury as opposed to virtually generating it. What I mean is, do you "generate" fury when you're at 100 fury?