Don't forget NQ Sushi for another cheap +77 Acc, and Distract for another 35 from a modestly geared /RDM (which should be your GEO, given stunning is meh in the zone on all but Hyoscya). The general "rule of thumb" for a high-acc set, as I recall, was around 900-930 Acc. Normally you don't need THAT much, this is just a particularly evasive mob.

So basically grab some support (GEO/RDM and BRD/WHM should be a good set), a healer, and two DDs who can skillchain, preferably with slashing damage. DRK and SAM are particularly good here, as is BLU and even WAR. Fudo, Torcleaver, Ukko's, and CDC all pair together nicely (or Upheaval + Reso, if you want to go that route for a light SC) for the sake of constant light SCs. Double-check your DDs to make sure they have an acc set that they can swap to so they don't miss like mad.