For those of you who want/need to complete this solo I've made a video depicting an easy route through the only section that seems like it requires an armor ability - the jetpack section. Make sure you do not accidentally use your sprint ability.
There is no commentary for the video so a couple of things to note ahead of time:
1. This can be done on Easy difficulty, so I recommend taking advantage of that.
2. Make sure you pick up a gravity hammer from one of the two brutes in the area with the elevator. You will be needing to use it 6 times (or more if you mess up a jump) so make sure that you save at least 30% ammo as each use costs 5%.
3. For jumps using the gravity hammer, swing the hammer right BEFORE jumping.
4. For jumps using frag grenades, jump just BEFORE the grenade explodes and swing the hammer while you still have upward momentum.