Play on easy. The first two areas you can just run through. run around the edges to not get shot. when you get to the crashed pelican, snipe the brute between you and the mongooses. take a mongoose and drive off. Go to the left of the longsword, you can fit underneath the little panel leaning against the rocks. drive the mongoose all the way to the normal wraith in the area where the Dawn comes down. jack the wraith and use it to kill everything in the area. Pick up a fuel rod and ammo for it. Take a scorpion and just rampage to the door that the oracle opens. when you get to the area with the three wraiths, keep to the left (where two of the wraiths are) to avoid the choppers down below. After you activate the bridge and get back outside drive the puma to the tanks. when you get to the scarab, take out a leg and then while its down, get at the right angle so that you can shoot the back of the scarab. Now, run up to the top of the tower , but wait for the pelican to drop off the Arbiter and a couple marines before heading inside. Assassinate the two brutes in each area of sleeping grunts, then run by them. In the last room before the cartographer, go down the left hallway and slip in the door. When you start heading downstairs, stick the the right hallway (the one you came in) and jump past the two mauler brutes and plasma cannon brute coming in the door. In the stalker room, stay up top and run to the other side of the room. Drop down and kill the jackals coming in as you leave, or they might follow you outside and can delay Johnson's pelican from arriving. For the brute tribal pow-wow thing, pull out your fuel rod and blow up everything. dont forget the two carbine jackals that come in. This is exactly what I did, and I finished in about 19 minutes with a lot of mistakes. If anything gets in your way, kill it but don't slow down too much, try to keep moving.

Try adding water to it.