There's a few reasons I occasionally die on Hashmal:

- Latency (With Rab, it always seems 50/50 whether or not I get some decent latency on Hashmal for some reason)

- Purple AoE's going off on the floor, with blue AoE's going off over them (I can't physically see the purple markers, which makes me wish SE would let us choose colors for AoE indicators)

- Just being unlucky/not paying attention and ending up on one far side of the arena, no sprint, as fire fist is coming for that side and trying to make the mad dash over.

- Sometimes, players just get me killed (Surrounded by purple markers that were all overlapping, so incredibly difficult for someone with my color-reading issues to mark out the one, slightly, lighter spot to stand on)

Latency is my main killer now, though. The rest I found workarounds/remind myself of them. Since, after Quake IV opening it'll be a short time for purple circles, so I stand a bit away from the raid and that pretty much works all the time.