I agree with Jon and Sinow — hit% for sure.
You'll really appreciate the hit% on Olga's 2nd phase and on the EVP buffed monsters of ep2 (especially Gibbons, Sinows, Ill Gills, Delbiters).
You could probably get away with using N-N-N with minimal MISS's (in most cases) on a RAmar with 0 hit PRs, but you wont reach the full power potential without heavy attacks.
Str8 hustlin' o .o