Should I buy Kalista or Vayne

Get Vayne... Kalista mechanics even though are nice they tend to be sorta hard to master

I say Kalista but then again, I am biased (✿◡‿◡)

Although Kalista is a very good champ who can snowball hard and can hop around like a bunny on steroids, Vayne is a better hard carry and late game adc. Get kalista if you want an overall good adc who can do a lot or get Vayne if your looking for a hard carry who can get pentakills off farming. They both have good mobility and damage out put. Kalista has better kite, but Vayne has better escape and cc. Its your pick man....

you'll have alot more enjoyment out of kalista

You need both. I main adc and play one or the other every game except I Caitlyn vs Draven.

Do you like carpal tunnel? If yes, then Kalista.