Human soldier Platinum solo: no Rare & UR items, no siphon/concussive weapons.

My soldier’s fingers would have fallen off pressing the fire button with the Mattock. That’s one reason why I dislike using semi-automatic weapons on my solo runs (except the Valkyrie). On my Common Only Soldier run, I found myself using the Avenger just enough to prime enemies for a Concussive Shot blast. On yours, I could see you had a better balance of dispatching enemies with both the Mattock (no doubt due to its better DPS) and your powers.

Some comments after watching your vid. You know these by now, but some comments might useful for new viewers.

* An enemy down to his last sliver of health or armor is just as dangerous as a newly spawned one.
* That place where you got downed twice by the same Saboteur is one of the deadliest places on Sandstorm. Anointed (and Sharpshooters) can also position themselves on the first-floor balcony/nook by the LZ and hit you from behind. Jumping up to the roof from Building 37 might be a better idea (unless that’s where those Saboteurs and Anointed originally spawned), though watch out for those Observers.
* Don’t get overconfident when the wave is down to the last three enemies, especially if there are double Saboteurs present. They can shoot their Ushiors very quickly when you least expect it.
* Don’t immediately gel when you get downed next to an Ascendant or Fiend. You can get hugged before you can start running away.
* I’d rather kite and control the position of the enemies on extraction than try to kill and rack up the score. The enemies may respawn at a location along your escape route.
* I would have went for Combat Fitness 5B since you had the Multicapacitor gear equipped. The difference is about .39 seconds (1.45s versus 1.84s while in cover), so it’s a case of diminishing returns. You survived just fine without it though.