I was in a group that wanted to cheese the whole thing, so I didn't care enough to find a legit team.
Set glitch up with person leaving at 0. There will then be 3 dogs. I don't know their paths, but they are L1, Trees, and R1. Get a 24 stack, 2 at each dog, then boom. One phase.
Set things up with person leaving. Do everything as usual. There will be no adds, but the bathers will still spawn in their pits and in the center for DPS phase. This can easily be 1 phased. Warlocks should be nova bomb with the slowed bomb that does DOT on impact. Titans should be hammers with the sun spots. Hunters should be Nighthawk.
This one is annoying. Just do it legit... BUT. When person leaves at 0, it'll have the add doors open, which means it worked, and no adds will spawn. The issue is that, the middle, where you use the elevator to go up, will be gone. It'll just be a pit, making it next to impossible to slam after each run. If you have the person do the glitch again, it'll respawn that elevator, and the add doors will also remain open. Please note that the leaving thing will need to be executed twice in a row successfully. If you get it once, have no elevator, and then screw up the second time, you'll need to do it two more times in a row. Then everything is as usual.