||12-31-2011 02:46 PM
I'd honestly say you have to either out-range her, or throw her off guard.
That is, someone like Brand, Anivia and Lux have excellent zoning and range capabilities to safe relatively safe.
Someone like Fizz can dodge, dive in and do some serious burst her (though if she's smart, she can kill a Fizz easy).
As Lux, I have no problems with Cass post-6. Most Cass's play very aggressively and aim to push your lane. Once my Lucents start to do decent damage, I can use them occassionally to zone and damage her. The second she's out of position, blow her up.
Brand has an easier time fighting against her because if he hits a sear after any spell, he gets that brief stun duration to hurt her. His passive will also take a tole on her HP progressively.
Playing smart against Cass is that if you get hit by any of her poisons, stay out of her range. She won't hesitate to run in and use multiple Twin Fangs after you're poisoned. Also if you can, stand somewhat away from minions. Though her passive makes spamming spells easier, she'll want to save her Q to last hit, not to harass 24/7 and get 0CS.
Edit: If she last hits with her autos, then she'll still need to come forward a bit to hit you if you have large range. Just watch her movements.
Also lol @ downvotes for trying to help. Oh, the LoL community.