On Atheon, I was the only survivor to be outside, near venus portal, and two dead teammates were ready to be revived near that time closed mars portal, killed earlier by supplicants (teleported part of the team were on mars). Since my weapon isn't maxed out, I didn't get rid of all the supplicants fast, instead decided to jump my way to fallen teammates, revive them and thus gain some fire support and open mars portal finally. Well, I got killed by supplicant's explosion (and obvious result) and wiped the team. And also I've fallen off the edge while dodging enemies' fire plenty of times.