You're inside a building, but it isn't in the best of shapes so stay in the light. When Wretches attack you , bring out your shotgun. After you get out of the building, turn right and pick up 18.Tag. On the backseat of a nearby car you can see a propane tank - shoot it, get close and keep your pace with the sliding car wreck. You'll find some ammo in the back of the gas station. What you need to do is to tank your APC (using the handle). Locusts prepared an ambush here, so stay on your toes. When a Boomer appears, get into the building and finish him off from there. Also, watch out for the Wretches. One more tip: do not shoot the gas tanks - hiding behind them isn't such a good idea either. It's a gas station after all and it isn't hard to blow it all up.
You need to get through the town with your APC. Take down Kryll using the UV rays. Pay attention to what your pilot says and where the Kryll come from.
This fight seems hard only at a first glance. Try to use the Troika turret (on the far right) for the most part. You'll find a sniper gun in the building, but don't shoot hiding enemy snipers - you'll need it later. At the end of the fight a crater appears and three Boomers with it. You can finish them off with well aimed sniper shots to the head...or you can blow them up shooting the propane tanks below.