Killed this 10 times with PUGs last night (best part: zero weapons dropped that anyone in the group could actually use for their main Job). Hadn't cleared it before then. The fight is very simple (by far the most similar to its NM version of any trial I can recall), compounded by the way shielding and healer power creep is trivializing any sort of damage that bosses can do. We were getting through the boss's ultimate without anyone taking damage. Tank buster? *Excog* What tank buster? Stop in and dine at the all-you-can-eat Vulnerability Buffet? Not a problem.

I've got case in point here. There is no way we should have killed this with how terribly we played (8 deaths!), but since you can outrun the raging incarnation of a tiger as a WHM in a dress, the tank can eat any Vuln stacks s/he likes because you can just employ Strategic Death® to drop them: https://youtu.be/5lOr3PtQxx4

My advice to those having difficulty: use voice comms. In my experience, PUGs that do so are far more effective. Why? Because when you screw up, you can let others know, and they can compensate; or when someone else is screwing up, you can tell them, "hey, you're screwing up"; or when someone is having trouble with a mechanic you can tell them, "hey, get behind the boss, he's casting Leg Sweep". And when you're talking to a real human being with a voice it makes people less inclined to just give up and ragequit. This is what kills most PUGs -- people get tired of sitting around, because every time you wipe, 1-2 people quit, so there's no consistency to the group. It's hard to kill anything that way.