I agree.Catherine is very hard to lock down and kill, and her stun and silence can make you extremely vulnerable during fights.This is why most builds got for health of defense early, so you can stay long enough to lifesteal your health back up. I have also found that aftershock catherine is also a problem, since she can stormguard, then she can just block your attacks while chipping out your health. Also, BlackFeather can burst you with his ultimate and feint of heart before you can build enough stacks on him, if blackfeather decides to go weapon power.