There are few champs that I hate to see on the enemy team, and she is one of them. Her E is likely the most bull s#!t thing I've seen as far as a skill shot goes. It has a huge AOE, it slows you while you are in it, she can reactivate it as soon as it lands so you don't even have a chance to dodge before it goes and it does really good damage for an ability that has so much going for it.
The way you counter her is supposed to be jumping on top of her, but her Q locks you (and an ally) out for ages and if you can avoid that, she still has a shield that reapplies itself, something I bet
wishes he had. Then to top it off, her long ranged death beam ult has a cooldown lower than just about every other ult in the game, even though it can one shot an ADC without so much as half a second to react.
I know that she is mana hungry which is still a big problem, but one
and that problem makes itself go away, even more if you go cheap and buy
so you can get something like
.