@Jack

The reason I said 1-2 ticks is because they would be doing the 2nd Full Thrust combo where some of it (I'm not sure how much of it admittedly) would be unbuffed by Disembowel, so I was giving an estimate of how much it'd take compared to that specific usage. I did word it a bit weird :P

And on adding in oGCDs on A6S adds, I didn't mention that because oGCD usage should be a given and they were asking about GCD usage specifically. I know how the phase works, but I will say there's no real reason the middle one has to die at the same time. Typically, I do RoT spam while adding in all of the oGCDs (Dragonfire as well from saving it), and it all dies with maybe 1-2 single target GCDs having to go out on the big one (in my old group. They all die same time in my current one). It's still quicker overall if everyone AoEs because melee can still get their Autoattacks and oGCD on the middle one and it'll die roughly same time, but AoEing will cause other party members to trade off an AoE GCD or two for a single target one, and it usually comes out being 1-2 GCD total less.

Just wanted to clarify some of my stances