ToME: the Tales of Maj'Eyal

This skill increases the offhand damage % to 155% of main hand damage.

So instead of this:

0/5 50% OH
1/5 54% OH
2/5 60% OH
3/5 66% OH
4/5 75% OH
5/5 85% OH

You get:

0/5 50% OH
1/5 154% OH
2/5 160% OH
3/5 166% OH
4/5 175% OH
5/5 185% OH

This also might help to explain why rogue enemies hit so &^%#ing hard.

edit

LN 117 of class/interface/combat.lua is

offmult = (mult or 1) / (2 - (math.max(self:getTalentLevel(Talents.T_DUAL_WEAPON_TRAINING), 8) / 6))

Should probably be

offmult = (mult or 1) / (2 - (math.max(self:getTalentLevel(Talents.T_DUAL_WEAPON_TRAINING), 8) / 6)) - 1

fixed

I might be reading this wrong, but shouldn't it be:
Math.max returns the highest of two values so it'd be working opposite from what you'd want. And that probably explains why off-hand damage is so high.

Yes that'st he fix I used