Last Ditch Request before the Final Stand

Playing with 120-ish mods, including Combat Extended.

Accepted a quest to keep hold of some prisoners, and fend off the raiding parties coming to rescue them.

When the first wave hit, they were easy enough. They were planning to set up mortars and lay waste to the colony, but I hit them with artillery first and mopped up whatever remained when they charged into the defensive line. It helped that all they had were small arms fire and plate armor.

But then the second wave came, and it's a squad of Warcaskets well over a dozen strong.

For those who don't know, Warcaskets come from the VFE Pirates mod and are essentially Space Marines. So big armor, bigger guns, and surprisingly fast for someone as bulky as a Range Rover.

My colony has Armor Piercing ammo, but not in a caliber big enough to pierce a Warcasket's steel. And while I have several M72 LAWs (single-shot disposable rocket launchers) that can one-shot 'em (trust me, I verified that), I don't have enough to fight off this many.

Is my colony just boned?