1: Yeah I get confuzzled with names, theorycrafting too much across all classes and builds :p Indeed I mean steady aim! (keep stuff afar for damage - hoooo skill, to keep it clear lol)
2: a Sentry build grants you some of the highest single target dps that a DH can have! But that also means gearing utterly weird. What I mean is max dex-speed-avg dmg jewelery. Because those things benefit sentries and nothing else, period. You can use your chakram, I do it too sometimes, love twin chakram or razor disc! Just go with entangling shot - chain gaing as main attack and skip the ever-popular devouring fart. :p It does good aoe dmg, hitting 4 targets, snares them all and grants you and yer sentry 15% dmg! Not so bad hu! You just spam chakram - chain - chakram - chain, to maintain the buff! Easy with high attackspeed ;) also never starves your hatred!
When I test things I do it simple, I get naked for less variations and then use a weapon I wish to use, and start testing :P Be it sentry dmg / shot (which is then compared to calculations/projected assumptions) or dmg recieved OR pet damages. I did find the wolf pet does beastly damage and actually has a 3 yard cleave (when some mobs with small hitboxes really are in it's face, say the tiny fallen in a 2/3) But it dies alot with subpar vit/allres on mp 3 and up!
I assumed rocket sentries debuff because they benefit from the dmg passive for rockets, had a quick go and after taking a few hundred hits (hurts, altho I can use gear for this, just vit gear tho, not to alter armor/allres too much in order to get a good high dmg taken / hit number, easier to spot variations in a 1000 hit than a 100 hit) and went by what I saw.
I haven't pvp'd but I know others who do and sentries aren't super against very tanky players. If your sentry fires at an average of 150k dmg per shot (which it will with good gear huhu) that'll end up being barely thousands vs a player, if even that. What's good is that it always hits! What's bad is you and your enemy move, and sentries have a boring cooldown.
My best tip would be: Use the smartest sentry rune. My rune xD Seriously though, in all situations except a 1+ minute fight, the 6 second sentry does the most damage because it'll take you 6-12-18 seconds to deploy your sentries, hence increasing their total dps by alot more than any other 8 second rune (8-16-24 just takes too long to get dmg rolling vs a boss or ubers).
Also in times of kiting or if you happen to misplace the sentry, OR fight a waller mod and you wish to deploy a new one which actually hits the target, the 6 second sentry always wins. Also if you just kill very quick and move from killzone to killzone, 8 seconds is too slow meaning you won't have a sentry out for every fight. Man, there are so many good reasons to use the simple 6-second-rune and nothing else unless specific situations demand it. I can understand someone wanting guardian rune for Hardcore or pvp, or even the life regen one if you go 1h+shield and aim for 100k hp :p But rocekts for raw dps = folly.
Bow = best economical choice when compared to sentry damage, windforce, but always aim for a socket because rubies rule. Get ias where you can, if you use a bow/1h xbow, aim for high avg dmg on rings/amulet, the more ias you have the more effective that damage becomes (when compared to dex).
When I used windforce and a 200m budget I had 147k dps with absolutely no crit/chd and my sentries each dealt 302k dps. I had a bit less IAS than now, sat at 76% without merc, had a bit more dex. Now I run a 600m budget and went 110% ias with merc, which nets me 200k++ dps with the same windforce under same conditions (tested, aiming even higher lol) so the speed adds more than the high dex when you reach crazy levels.
If I wanted to inflate my sheet dps i'd get more crit gear and ease up on ias but I don't care for my own stats, only what's good for the sentry. ;)
Tired fingers, sorry for writing the 86th chapter in the bible!
One last note: Shadow power vs 1.5 secs of immortality? I found that I use shadow power : gloom when I use a non-lifesteal weapon, because I must have it vs reflect mobs unless I want to let my sentries kill them all on their own, which takes longer... With Windforce I used the IWIN button instead, because there was no need to facetank stuff, rather get out/away from jailor, bad situations, etc. Well, you see my skills... I switch out Prep for traps if I use a uberfat Manticore, which I aim to do when a good one shows up on the AH (I will have 2.6 aps with a manticore which is still fast, so it works, love it's high min dmg and lets me use trap play again which is rather weak with bow/1h xbow)
FIRE ZI MISSLES!