Kalista
What to Keep:
While she has been a nightmare in balancing, I do feel she is in an acceptable state. All of her kit fits together and she has the potential to be great in the right hands. I would make a small change to her W-Sentinel.
What to Change:
W-Sentinel: I do not feel that a ghost moving around is really gonna be that impactful; instead, I would change it so that it stay in one place, but it fears enemies that discover her while alarming the Kalista player and then disappearing instead of the enemy having to kill it.
62.6 base AD:
Stand Aside 75 + 50% = 106
3x Whirling Axes autos (165% + 35) = 415
TOTAL = 521