Jin-rokh- Demo. Superior mobility for kiting out fissures and getting back in quickly, if pets (re:wild imps) are fixed to benefit from pools, I can see it outdamaging aff when paired with AV.
Horridon- Affsup. Shards ahoy and you can leave your pet on horridon who gets an extra 50% dmg taken after each of the 4 gates. While I feel aff will be "easiest" to maintain on this fight, I'm considering destro for havoc cleaving onto horridon with the sburn potential on the adds. Not really considering demo since the adds fall over as is on normal, and if they lasted longer, I'd be more inclined to aff anyway with the number.
Council- Affsup. 4 targets? Predictable time to explode two seeds and adds that feed you shards? No contest imo, but I've heard some talking up demo. Guess it depends on how close you tank Mar'li to the other two (Not even mentioning roller derby guy).
Tortos- Aff / demo. Probably Aff since the bat aoe isn't really lasting to sell me on demo. Maintaining dots on the Turtles / soc on boss hitting the bats + high mg uptime and I'll be giving sac a shot first.
Megeara- Destro. Adding a 2nd target for constant rof (subject to change with a haste heavy build I guess), makes this fight look pretty nice for high ember generation.
Ji-kun- Destro. Burst aoe on the platforms and I have yet to see pets working correctly here anyway
Primordious- Aff. Considered destro, but to get the benefit of fire and brimstone, depending on how you kite him, the damage will most likely be wasted. Shards from everything won't be.
Dark Animus- Didn't do much testing on this, but probably aff until I'm more comfortable with the order of events in p2 / strat.
Durumu- Demo. AV for beams + mobility, and leaping a failed maze.
Iron qon- Demo. When testing, cd's lined up nicely with the first, third, and fourth execute phases, and soulfire damage was pretty high despite the high mana cost. I think quetzl or whatever the second dog was had fairly less hp. Aff if pets still get killed here though :<
Twins- Aff, low movement and damage if you're doing it right since the nerfs. Got much more out of sb:ss during p1 onto suen when she popped in to say hello before disappearing as well.
Lei Shen- Aff because it's what I'm most comfortable with at the moment and will probably see the highest return before settling into the encounter. He died incredibly fast on the ptr, so hopefully that's changed, and the winds were not an issue with KJC.
tl;dr looking forward to experimenting with all 3.