Our guild attempted twins just tonight and we took them to 70% until either a tank or a lock died because of arcane explosion. And that was the only problem we had. I couldn't watch both sides at the same time but warlocks complained that Veklor started chasing them after they got aggro with searing pain. Does this have to do with their distance to Veklor? They are in the searing pain distance but Veklor still moves towards them. So maybe he wants to see people a bit closer? Maybe just outside melee range is a good place to stand for a lock? And when he chases the lock he comes close to warrior/healers and AE happens.

Warlock is moving away from Vek'lor too soon. Gotta wait until after the port finishes THEN book it.

The warlock is not moving away. The warlock stays like 25 yards away, he spams searing pain, he gets aggro, and then Veklor starts moving towards him instead of shadowbolting him.

When the warlock peels aggro and Vek'lor runs at him, have him move. Vek'lor will stop and start casting.

Is there a fixed distance where the warlock can stand so Veklor doesn't move towards him?

I think it's inevitable that it will happen at least a few times in a fight, as soon as it happens just get the warlock to back off and he should stop running towards him.

If Vek'lor moves toward a tank, have the tank strafe or mouse-click-move away (fastest ways to get out). Stepping back is workable as long as you do it fast enough, it just reduces the margin for error.

(Strafing, obviously, is only effective if you're not directly facing Vek'lor, you need to have him over your left or right shoulder.)

I see you don't give proximity threat to the warlock, should have read a bit closer.

Anyway, Vek'lor runs to whatever position the aggro stealer is located at the instant they pull aggro, he then runs to that spot (not the person) and then checks to see if there is trigger condition for arcane explosion, if not starts shadowbolting his target. So once the warlock gains aggro he reposition outside of where he was standing as Vek'lor will start standing there shortly and you need to prevent an arcane explosion.

Seems so much easier to just give the warlock proximity aggro though as then the emperors never move, but it requires a lot of trust in the warlock/warrior team not to mess up the positioning I guess.

Also, don't skimp on Greater Arcane Protection. You still have learn to recover from the movement, but there's much less chance that anyone will actually die.

Seems like you are using a lock tank? Try the 2 warriors strat instead using battleshout to hold agro on the caster. All caster dps focus on killing bugs and throw occasional dmg at veklor

We switched to this strat after a night of wiping when we were learning this and killed them after 2 or 3 attempts. Only need a warlock for the initial pull

We do it similiar to how you are, with locks peeling aggro off the warriors on the port. As a warlock who tanks them using this method, atleast 2-3 times per fight will he chase after me for no apparent reason, just have the warlock move back a bit and tell the warrior to reposition the other emperor on the port. It really isn't such a big problem, just have the warlock save his shadow ward for when he gets chased so he has atleast a little bit of breathing room if he moves out of range of his healers.

Lock tactics ftw. I have Destr. Reach talent and stand close to max range when peeling veklor. When he strarts moving, he goes few yards but stops and im outside arc exp range. He does that, just tell lock to move step backwards, it's no big deal.

Echoing what was said above, just move back a bit. It's really all about practice and awareness. You shouldn't ever get hit by a bug explosion or arcane burst, and at most one tick of Blizzard (which you should Shadow Ward while moving out of). I tank it with Fort, Mark and Shadow Prot and no other buffs what so ever with 0 pts in Demonic Embrace. It's all about how you move.

Its just like they said. The warlock can just take a quick step left and right or back once to get him to stop if need be. I dunno if this will help, but I threw this together for a buddy that was asking me some similar questions, but for a warrior tank.

http://www.ifilm.com/ifilmdetail/2775907

(Don't critique it, i just threw it together in an hour. Just for information. Windows Movie Maker sucks hardcore.)

In my experience, Vek'lor has a much larger tendency to run after a new target when he changes aggro mid-port. I see it a serious disadvantage of the "Warlock pulls of Warrior with SP" strategy. Whenever we have a bad transition due to Uppercut, we brace ourselves for Vek'lor to run after the Warlock when he gets aggro. He stands far away, in a direction that won't cause them to heal if he runs, and healers all reposition so they're not near him and won't mess up the next Vek'nilash pickup. It would be a huge pain to do every port that way.

Sometimes it happens even on a correct transition, of course. If you use Soul Link, it's probably fine. We've never used Soul Link, and it's always pretty harrowing if Arcane Protection isn't up.