Finally did
margok, so here are mine for that.
-CX worked really well for last phase, we saved cd's and lusted on cho'gall, so that turned last phase into basically a mini-butcher.
-CX+2set+celerity syncs really well with incoming wave, you dump your chi/energy as he casts, step out and roll back in as the cast completes to abuse your 2set. You can *almost* ignore the cleave if you roll, so long as no-one is going to try walking through right on top of you - I did end up needing to make weakaura to show when I had disc bubble, because without it things change - "Why did you die, omg". I also made a weakaura to yell at me when I had 3 charges of roll, because I found I was losing casts during warmages etc.
-We didn't have problems with the aberrations, but they were the weakest point in my damage profile as CX, because I mostly SEF'd them while keeping on boss unless it was just before a transition or tod was up - I was top3 on margok/chogall/warmages, the latter two being significant pressure points.
-Trancendence worked really well as a backup port for the waves when things got messy, but I found our tanks moved the boss too much / balls kept making me too nervous for it to be preferred method (I would be 100% hp after rolling through the wave if I had a disc bubble). I ended up using either diffuse magic or zen med to walk through the wave if I didn't have a bubble and balls were incoming (rare) - Our biggest problem at that point was random deaths, not damage, so safety>all to have everyone alive for chogall.
-We had 3 tod's on chogall (one monk of each spec). They accounted for just over 2% of his hp, turning an almost 3% wipe into a kill.
Overall, we aren't great numbers dps on this fight compared to some other classes, but we can definitely bring the bits that count, and our kit handles the mechanics well - ToD's on high priority targets, SEF on mages, chogall burst, mobility/mitigation on the waves.