Ok so theres only one area in this mission besides the one where you land. From where you enter go right and spot the green truck here. This provides excellent cover for you. Take out the enemies that are on the bridge first and foremost. Clear a path towards the upper right part of the area (where the intel on top of the building is/was), run through the open trailer and clear yet another path.

There are ammo crates everywhere in the mission so it would be wise to spam your Grenades until you deal with most enemies. Start going left and get under the tent to find another ammo crate. You’re right underneath the turrets so spam your Grenades until you clear out a path going up.

Once its time to regroup, a bunch of ASTs appear to make your life miserable. Instead of taking them out like you normally would, get up to that turret and shoot them down. There’s one last AST you won’t be able to get and its all the way on the southern aside you’ve gotta fight your way back here but this time follow the buildings on the right side for best cover.

There’s another ammo crate on this side so you know what that means, spam your Smart Grenades until most enemies are dealt with. You can see the AST from here on top of the building, but get up here from the far left side so you don’t have any problems. This is a good place to deal with the AST using your grapple, just lime you did with the enemies in Mission 8. When its time to get the Stinger, Boost Slam to the ground to evade all the bullets flying at you.