Just played Kalista
I played Kalista for the first time and I had the same impression I did when I played Lucien the 1st time. She is op and i would feel ashamed to play her with her ablities, Her Ult, and the black spear.
When you can get some AS and MS on Kalista you can weave around Lux's skill shots. She is like old Nidalee in how she can chase and retreat and throw spears. 2 AAs, rend, spear throw is enough to kill many champs. Rend can be abused to ks really easily.