Which supports best fit Kai'Sa?

Since most of us havent played her yet, just some theoretical suggestions would be more than enough. As a sup main I would like to be prepared for the Kai'Sa onslaught which is about to begin bot (and any other lane for that matter). So, what are your opinions? Which supports are the best at unlocking Kai'Sas full potential? PS: Looking forward to supporting you all.
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