does kalista need a buff? just look at that win rate :/
a good win rate for a champion is 50% but kalista is normaly sitting at 45% http://www.lolking.net/champions/kalista#statistics not many people play her and also shes kinda just.... outdated. she just doesn't fit the play style of newer adc's, she kinda relies on her passive like most new champions, aurilian sol and jhin but she just does nowere near as much damage as them and takes way more skill. I cant really explain it but kalista is one of the worste adcs atm.