Game Play

Trex is in the cockpit and in cover. Any ranged combat against him will suffer 1 Setback die.
Oskara has found some cover along the wall - (Setback die to any attacks against her).
Vex is staying out of sight.
Pash is close enough to move and attack this round.

Since we lost a person, I've removed one slot from the bottom of the initiative order. Which means the top slot is still open for PC use, so.....

A turn to the first player that takes it!

Round 4:
Any PC,
Trex,
Any PC, Any PC

Trex's attack on Oskara.
A Triumph on an attack will outright kill Minions and Rivals, and will trigger a Critical Injury roll on PCs and Nemesis' (Trex).
Also, as long as the Critical Injury is untreated (even if the effect wears off), any further Critical Injury roll will have 10 added. (This stacks for multiple CIs).

Oskara Takes 11 Wound - her soak, which I think puts her AT her threshold of 12 (still in the fight).
Oskara also suffers "Slightly Dazed" and is Disoriented until the end of the encounter. (add a Setback (Black) die to all checks).
Trex is in the cockpit and in cover. Any ranged combat against him will suffer 1 Setback die.
Trex suffers "Winded" and can no longer voluntarily suffer Strain to activate abilities or gain maneuvers.
Oskara has found some cover along the wall - (Setback die to any attacks against her).
Vex is staying out of sight.
Pash is close enough to move and attack this round.

Pash and Vex to act.

Round 4:
Any PC,
Trex,
Any PC, Any PC

Trex has been murderized.
PCs can recover Strain at the end of this encounter. (Simple (no Purple) Cool or Discipline Check, your choice).

Dead Trandoshan in the cockpit. Part needed to get the ship working in hand. Ship still physically clamped to the landing pad.

What's the move?

To install the HMRI someone will have to make an Average (2P) Mechanics check. Both locks outside of the ship can be removed manually. each requiring an Upgraded Hard (1Red/2Purple) Mechanics check and about 10 minutes of time. Failure of the check will most likely raise an alarm.

Yes, that's exactly how to handle the assist. And you are correct, VEX has succeeded both and has two unused Advantage! Once we determine Oskara's been doing we'll move on.

I fear I may have to install that part, too lol

Have VEX roll an easy (1P) Knowledge check, to see what he knows of the device.