Much like the old Machinist, Dancer's damage is very dependent on CDs and luck. Popping everything feels awesome and dances are great, but once you exhaust your procs after Devilment and Flourish, you are pretty much just hoping for procs. I'd guess it gets a bit better with Saber Dance, and I don't know what the overall dps looks like, but you should be good in a group thanks to sharing your damage cooldowns with the group.