And 1 thing about dual wield, dont believe the damage figures you see in the character tab, but check on damage alone for each weapon, as each weapon will reduce damage its damage with mob's resistance. Also its quite pointless to raise dual wield mastery after level 8, cause from what I notice, the off hand weapon wont increase damage after skill lvl 8, only slightly increment for the main hand weapon only. For best damage with thousand strike, 2 handed weapon will be better compare dual wield, as 2 handed weapon will had the highest damage output, where thousand strike with dual wield will result in each hit having the same damage output as your normal strike. The pros of using dual wield is we will be getting alot more charm slots, and enchantment slot, comparing to 2 hander and a more stable damage output.

I'm lvl 30 now and confirm doing 300+ damage with each strike on enemy similar lvl to me, if both hand crits damage will be bout 500+ to 600+. Damage on lower lvl mob bout lvl 27 will be bout 400+