User blog comment:Willbachbakal/(Champion Rework) Kalista, the Spear of Vengeance/@comment-4888212-20150728224651/@comment-1330314-20150731175822

I feel it makes sense for Sentinel to be a one-point wonder, since its most visible contribution is its mobile ward. Q is definitely not something you'd rank up first, but I do feel its damage would go up significantly in the late-game.

Regarding the Oathsworn interaction, I'd probably go with option B if there ever happens to be a problem, as the core intention is for Kalista to work really well in tandem with her support, even at the cost of personal power.