http://ddowiki.com/page/Category:Quarterstaffs
There's 17 staves with better-than-normal crit specs. Unfortunately, most of the good ones are BtCoA or drop from P2P content you don't have (yet). Luminous Truth is not bad, though - Incandescence, Flaming Burst, 19-20/x2 crit profile - and drops from a F2P quest (Spinner of Shadows). Stout Oak is good too and relatively easy to acquire; though like Tom116 said, you need Estar Comms which only drop from P2P quests, IIRC.
But even if you're stuck using crafted or lootgen staves, on a pure Acrobat you'll still have +20% atk speed, 17-20/x3 crit profile (w/Staff Spec + IC:Blunt), +41% avg doublestrike (+20% Cartwheel Charge, +25% Quick Strike every 10 out of 12 secs), and lots of sneak atks. Add in Cleaves, glancing blows, etc. and you should have plenty of DPS.
The issue with Acrobats isn't DPS, it's staying alive.