Originally Posted by
Sonnillon
Yes and no.
You can and you should burn Sul as low as possible when the first troll (Malakk) is empowered on pull, but you cannot really take Sul's HP as a reference point. As the amount of HP he has once you switch depends on how good your DPS is. I would suggest that you just watch Malakk's empowerment bar (your boss frames should show it) and around 50 empowerment just switch to Malakk.
If 50 is too late for you, go with 40. If 50 is more then enough, go with 60 empowerment. As you will have to work out yourself at which point is comfortable and gives your DPS enough time to bring Malakk out of his empowerment.
That's why referencing Sul's HP for the moment to switch is bad, as if you do it too late, you will sit at 100 empowerment for a while, and that is the most definite killer. As your healers will run oom fast. If you watch his empowerment bar, you don't have to worry how bad or good your DPS is, as you are not aiming for a certain amount of HP.