I've been playing around with the gunship today with some of my friends, and we figured that thing out. It requires a full squad( and a slightly competent team) to run at full potential. Of course you have your two gunners the gunner needs to spot and take out the big targets like tanks and helis. You have the 25mm taking out softer targets and deploying flares in accordance with the gunner. Next you can have either 2 jets or one Attack chopper and one jet, I find the jet is necessary in defending you gunship. The jet can take out enemy aircraft and be used as an extra set of flares when needed. The attack chopper mainly supports the gunship against igglas once you spawn trap the enemy. Using these tactics your gunship can fly for a very long time(36 kill streak today).