after switching back to combat this tier, I feel like I have the hang of it again after a full raiding week with it. Beating out the muta rogues in my raid on single target fights - norushen, galakras burn phase.
If you are thinking of switching make sure you hang onto T15 4 piece, all 5 pieces are best as then you can just use any SoO off spec piece to maximize dps. You definitely need the AoC trinket first before switching, and then a Seismic Bore for MH if you can get your hands on one. Tell your monks to take one of the other 6 agi one-handers in the instance. Unless of course you can get a WF weapon then grab that. But the bore is glorious.