Arena strategy for the Nightsisters with the "new" Acolyte

I run NS on one of my accounts, and Nightmare on another. I have no trouble beating NS with Nightmare, but I also have very little trouble beating the Nightmare teams with my NS. You can definitely use NS in the arena, just be prepared to be active because you'll need to climb back up every day from dropping. NS are an easy target on offence unless you run CLS rebels or JTR or something.