Kai' Sa AP vs AD
First game with her, and I went all AP (mostly)
https://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2736894932/239198231?tab=overview
gonna do AD next(no Crit though)
ok here is AD results
https://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2736939207/239198231?tab=overview
make sure to pay attention to Damage graph
Edit:Updated!
Drawing an conclusive comparsion, you naturally do minor magic damage with more AD, however, you deal near 0-small amount of PHYS damage, with full AP, so you have a higher winrate with AD builds, vs AP builds. NOT to mention your R shields scale more off AD than AP.