You can use Katarina for a LONG time. A long long time. If you're facing a mid with a stun then go top.
Get mejais and even sword of the occult and just trollololol. As Red said she's the pub stomp king. I have an account where she's my only character I've bought. She's just very easy to win with.
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Realo won gold at the Sex Olympics with a BROKEN FRIGGIN NECK.-Voltch