4 attempts = 3 deaths
Attempt 1 = Jumping puzzle death
Attempt 2 = Jumping puzzle death (noble savage, to be fair he timed his death with another guy exactly)
Attempt 3 = We went to orbit and that apparently counts as a new raid. (Cleared Atheon anyway)
Attempt 4 = Guy bugged going through portal and got trapped inside. (Cleared Atheon anyway)
So yes, you are correct, no deaths to mobs. Unless being level 32 helps people jump or fixes the buggy portal we will nail it next attempt at 30.
I have not died in the past 4 attempts at least.