Holy crap! R.I.P, Valinar!
Candi says:
I realize Eithne and Ohica were about to attempt a magical traversal. I haven't resolved that because, I wasn't sure if, with Valinar's death, they still want to do that.
After taking 14hp damage, Eithne is down to 8hp. She can't take another hit like that. If she attempts the platforms and gets hit, even if it doen't kill her, a failed concentration check will drop her and her "passenger" into the pit. He has advantage on concentration checks [War Caster feat] but it's still risky.
I feel like trying it unless someone has a better idea. There's my lifeline idea if you want to attempt it and if there's enough rope. I don't know the frequency the geyser eruptions but it looks like there's not enough time to dash across by any means without getting hit at least once. I don't know. One thing's for sure: people standing around on the platform will just get hit again and again.
To be honest, Eithne could just wildshape into a lizard, cross the ceiling unharmed and wait for you all on the other side.