I'm in a pretty low ELO so i'm not sure what is going to happen when i get into a higher elo. My question is using Karma to counter Kass. I have been having really good luck in the lane faze zoning him out. when he rifts to me i can just slow him plus the shield. and the heal lets me get a couple levels on him pretty fast. i was just wondering if that match up will still work in a higher elo?

Totally depends how you play and how the enemy Kassadin would play. The reason Kassadin is so strong against Mid Champions is because he not only has the gap-closer, but the silence. I would think that Karma would fare well against him, because when he Ultimate's in and his silence is over, she is low health with a Shield and a Heal (and with rising AP the lower her Health gets? That's gonna be a lot of damage.)

dont play karma in high elo, NO ult = fail hero, trust me you need a mid who can carry