Ls or ds bastila.

Depends entirely what other characters you have and what teams you’re focussing on

I like goth chicks, go for fallen. :#

I was and still am using a g11 LS Bastila on my JKR squad and she does just fine.
Go DS Bastila all the way as she'll also highly profit from the health boost (+70% max health from her unique) especially once she gets up to g13.