I have a Smitadin, and I have to say, The Gnasher is NOT the best smiting weapon. At least, imo. It's too slow. I'd have to say it's all about + skills. Getting about +6-8 skills (4 from weapon/shield, 2 from ammy, other +'s tarn and/or SoJ(s)) will achieve you 1.1k to about 1.3k Smite damage. Not too shabby. Look around for a +2 (Insert fast weapon here) 40% IAS. Although the Gnasher looks sexy at first sight, it really insn't. Also, going vs barbs is damn hard. I've never beaten a WWer.