Which champion is better LeBlanc or Katarina .

I am nearing 3150 ip points and am thinking of either Katarina or LeBlanc. They both have gapclosers which I like. I want to know which one is more likely to get nerfed in the future and who has a higher amount of burst damage. I would also like who is better overall and strengths and weaknesses. Thnx in advance. DONT FORGET TO ALSO VOTE IN THE POLL. 1359
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