Hope its helpful GL! :)
Just turn on elective mode in the options menu. I wonder how many people dont know about this lol.
Vita > Skill.
Diablo on Hell isn't hard.
One shotted Diablo on Hell and I had like 41k hp and 9k dps.
For various reason, I didn't try to sit in the bone prisons :P
Evasive Fire and Entangling shot is just a complete waste, since you only need to keep your distance to him, fire Cinder Arrow as often you can and Impale with bleed effect whenever you have the balls for it.
Phase 1 is just to easy, whenever he charges for you, just Tumble away.
Phase 2 the same thing, pop Smoke Screen after 1-2 autos in your Clone so he wont rape you. Burst him down with Impale then continue the autohits with Cinder just as you did in phase 1.
Phase 3 is just like phase 1. Don´t get hit by his spells, which is REALLY easy to dodge. If you feel like his rain of electricfireshiet will hit you. Just pop Smoke.
Remember that Preparation and Smoke Screen is OP, abuse it!
Perfectionist - Archery and w/e you feel like. NS or TA works really good, even SA as the last passive.
Funny to see evasive fire get some use in the video. I stopped using that after I chain backflipped from a teleporter elite into yet another elite pack in ActII Hell heh.
Using smoke screen, even without prep you can completely avoid any damage he throws at you. 2nd phase, prep and 1-2 shot your companion, or even then burn a few smokescreens in a row if need be, after that the only thing diablo does is throw the occasional fireball, run anywhere until it spawns the circle and you win.
Strangely diablo is an increadibly easy fight, if you wanted to, you could kill him completely using the damage from sentry turret, whilst running away.
Got home and oneshotted him on first try with 2.5k dps 12k hp and lvl 50. Toke me like 15-20 min, and then i went to get my gf..