monk q: 1-hs or 2-hs for duoing?

[Rayge]

Hey all, I'd like some input on monk weapons. I'm an iksar monk, currently lv. 24, duoing with my pal (a 24 shm). I've come into some plat, and i'm looking at upgrading my weapons. Here's what I've been using:

sap of piety, fighting baton
adamantite bo stick

and if I were to upgrade I would go to either of these:

2 trance sticks
Wu's Quivering Staff

At first I ofc wanted a set of trance sticks, but I was told that once I get riposte and such, I'll duo way better with the quivering staff. Any advice or information would be appreciated. thanks!