Originally Posted by
Dracodraco
The main issue with Horridon is the damage that poison volley does if its not interrupted correctly. In a 25 man, a mistweaver can dispell all psn debuffs with revival. What you're seeing is probably the trend that 25 man almost always has a monk healer to rely on, while not every 10 man does.
Also, each set of trolls uses a different class of debuff - Magic, Psn, Disease, Curse. If you don't have a healing setup that can handle all, then it's just tough luck. 25 Man does not have this issue, while 10 man might.
So the overtuning comes from the issue of scaling the encounter from 25 to 10, due to debuffs I guess.