To begin with, I kind of agree with the sentiment behind the OP. From my understanding, the fact that Lustrate ignores healing debuffs is why some prefer SCH over WHM in coil; the 2.1 buff only highlights it all the more.


However, I'd give the edge to WHM in Siren:

1) WHM has a healing potency boosting CD and Heal II, which make the mind control debuff a joke. Lustrate works here too, but with WHM I don't have to freak out over the timing of Aetherflow.

2) Zombies that perma-stun SUCK if you get caught. WHM's knockback + root gives you plenty of breathing room to continue healing -- SCH has no such luxury.

3) If the healing debuff couldn't be removed or the cast silenced, you'd have a point. But come on, you don't have 7.5-10 seconds in convenient 1.5 second intervals to remove it? This fight is not THAT healing intensive -- it just has a number of anti-healer mechanics.

4) Siren hit everybody but me with the debuff nearing last phase! Oh wait, Cure III.