Uhhh... put a Defender's Lightblade or any other 20/30ish 1handers you can buy. Dmg bonus isn't used for offhand and only ratio really matters as others have said. Every time you swing your primary it will do a dual wield check, every successful one causes your secondary to swing. So, no, a high dmg item is much better than a low delay just as long as the ratio is as good... even if it isn't, the higher dmg will probably be better.
Anywho, 2 tox = redundant and stupid.

