Killing the Charr groundpounder first?
Jetpack dude goes Psycho, the outside rim of the area becomes a death trap that pushes you back off the side and the Firestorm throws down more AOEs.
For me it’s just bad luck – there are fire fields not showing and shockwaves not syncing with their animations, which can be anything from a barely noticeable nuisance to near instant death depending on how many hit me at a time and how severe they were. That, and the one guy occasionally teleports to me and instantly does something equivalent to warrior’s stomp, sending me over the edge in rare cases or into fire fields more likely.
If you kill him first the other guy turns the outer part of the arena into a whirlwind that knocks you back off the platform slowly, but you can stand in the middle area and move around his fire things where possible, and it’s not very difficult. I’ve yet to see it fail after that point actually.
I did both variants last night.
If you kill the smashy-smashy guy first, the jetpack guys makes the arena smaller(some “force field” on the outer half which pushes you) and throws aoe like always.
If you kill the flying guy first, then Smashy goes crazy and I think he starts getting flame shield protection once in a while.
I found killing Smashy first as being the easier way.