should i switch?
Life Drain was a good talent for Skull Knight and that's all xD It's good talent (but crest better) for some archdemon (u can use LD for archdemon heroes, but there not the best for him, I think)
For Storm use damage + r5 for quickly fight (arena, LB, Laby) but he can be kill very quickly. Or u can use Flame Guard + r5 too, very nice talent for pvp.
There is a thread on ios about Storm Eater, it is a baseline but will give you some insight as to what you want to do with him.