Heimer and Kalista
Just remove them from the game. We've moved on from the bull that was Teemo and have these champs that don't make sense. Why would his machines apply his spell effects? Why is an adc, who is supposed to be fairly stationary and shoot from the back, the most mobile champion in the game? Why would you give her a stacking slow, percent max health shred, and a copied ability with a 1.0 ad scaling? Heimer's mega turrets might as well just be another champion on the enemy team.
and
?
is a high skill champion, and her passive takes practice to use efficiently and effectively.
can is countered by the fact he can't easily leave his turrets to help teammates. Simply, put pressure in other lanes so he'll be forced to leave his and help. Also, mega turret should just avoided unless you can tank it