Survival, Stormbreaker, double carro front, banshee, L flak. One engineer had either normal repair kit, or hull camp kit. The other had mallet, spanner, buff. And the other had pipe wrench, extinguish, buff. The buffs are important. As for special abilities everyone had the advance dynabuff kit, and captain had drift. Everyone had greased rounds and the captain took burst for more doc on the flak when there was a drill. So. The front two carronades had to be buffed for engagements, they were used to strip hull as well as pop balloons. We could have a hull out with those carro's from 1 clip. Even quicker if buffed. By popping their balloon we were able to manage engagements better, and take them in more 1v1's. If there were many to attack, and engineer would pop the buff ability and they would be destroyed in seconds. Banshee would be used to finish them off and had better downward arcs, and the flak was more used for the drill. For the boss it was especially easy. An engineer would pop a buff, it would only take one clip carronade on a hard point in order to strip hull. We were also able to pop the bosses balloon, often unintentionally but it worked out. Then just 5 shots of banshee to kill its hull section. The buff lasts for a whole minute so we would have the boss down in about that time. If we died, it was usually to a stray corsair/axil but by that time our buffs had recharged on another engineer.
This also worked on defense but survival is usually quicker.