Hey, I'm on my first playthrough and had no idea what to expect. I saved before I left for the mission, though - I'm going to try again with 13 Gals (and even more explosives) in the Fortuna.Edit: And they still owned my punk ass in 3 rounds.
Am I one of the ONLY players who plays defensively?
Are you using your cover?
First few rounds you need to be ducking out of the ship, taking shots, shooting rockets, looking for the underground entrances. Maybe have somebody with high TUs to go out there and hide in the structures to do some spotting. Then make a break for the underground entrance and just rush it. Stay on the surface exposed and you'll get owned by the tanks and some of the other dudes.
Once you're underground you can just resolve most of that, and wait until the end for dealing with the Surface. In which case you're going to be ducking up to take shots at the tanks... rockets, grenades, and heavy laser type of thing, then drop back down to cover again.
Another tip - you probably want to shoot Snap shots or fire from out of view (even with your rocket launchers). If you use too many TU in your attacks you're going to run the risk of the Tanks being able to reaction fire on you (reaction fire, as explained in the bootypedia, is not a random chance - the more TU you use the more likely someone will be able to react).
This is a good map to bring Baby Nukes to, since you wont have to fight this mission again.
(without a doubt they will Not Surrender in this mission, so dont bother with that tactic... im not sure the supersoldiers can even surrender)
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Edit - Also in a recent pogrom mission with ratmen I had a tank that took an entire series of melee hits from a lowly ratman, from behind, probably with a cutlass. And it clipped over 40 health from the tank.
So keep it in mind that if you've got a Tech Blade, Mace, with a hand of peak strength you can take down one of these tanks.
(im also thinking that if you can Surround a tank, one hand on each of the sides so that it cant move... it may not take any actions at all because its main weapon is explosive and it doesn't want to fire it at point blank range)