Shuriken Offhand Companion Weapon

[Varr]

I've a Drow 18/2 DC casting Vamp/Monk. As a toy, I have crafted a Spite with Rubies of Good and Vamp Slayer and 8 rare filigree (3 Crackshot and 5 Deadly Rain for Ranged power boosts.)

I've never really dug into the Shuriken throwers so don't understand the off hand mechanic. Instead of really digging in, thought I'd just ask for some suggestions.

Need an off hand Short Sword or Kama that adds useful goodies to the Shuriken when I decide to toss it around. These times will mostly be when I'm feeling lazy and looking at a Dragon or some other big boss type. Prefer to stay centered so I don't have to hit a second button to re-center after switching back to handwraps.

I know its silly asking an optimization question for a set up I'll use .1% of the time, about as silly as building the Shuriken in the first place.

Anyway, advice appreciated.