Sorry SE, but endgame won't work if you don't fix something.

[Unruhe]

You don't turn to face them to move while you're casting. I mean, of course you face them when you cast, but if they run around to your back, you don't turn to them, do you?

No, you don't. In fact, at least with certain control setups, you can't turn AT ALL while casting. This makes casting with poor positioning checks exceptionally awful. If you aren't properly squared to your target (or if your target moves even slightly too far to the left or right of center) then the spell will fail. And that's assuming you were firmly planted -- if you run, stop, and immediately cast there's an odds-on chance that the cast will "interrupt" a half-second in because the last time the server bothered to check where you were, you were in a different position, so it thinks you're still moving and cancels the cast.