As you land, move to the ramp. Use a locked rocket to destroy the nearest Shade, then take cover from the Grunts and pick them off with your SMG. Go through the archway and up to the top. Destroy the Shade in the building on the far side, and if you're lucky, you will kill the Jackal Sniper as well. If you don't kill it, grab a Battle Rifle from the drop pod nearest to you (swap for your SMG) and shoot it in the head. Stay out of its sight until you are ready to kill it or you will die. Proceed to the structure where the Jackal was, destroy any remaining Shades, then swap your Rocket launcher for a Plasma Pistol. Use the resulting Noob Combo to kill the Elites and the Battle Rifle to kill the remaining Grunts, but stay in the structure.