Here's how I'd change Kalista
#Passive
No longer can jump over any wall in the game
#Q
Q Damage changed to 70/130/190/250/310 + (100% Bonus AD) from 10/70/130/190/250 + (100% AD)
#W
Passive's damage is change to 6/10/14/18/22% from 12/14/16/18/20%
#E
Slow changed to 30% at all ranks from 25/30/35/40/45% Slow duration reduced to 1second from 2seconds Now required to have 3 spears in the champions before you can activate rend. You now gain bonus effects when you reach certain number of spears in a person: 6: Slow duration increased to 2seconds for target 8: Slow increased to 40% 10: Slow increased to 50%, and you gain 10% Speed Boost for .5 seconds.
Crosspost: http://boards.na.leagueoflegends.com/en/c/GD/bKIEKdu4-heres-how-id-change-kalista