I just got to the part where my mammoth got disabled by the weird covenant ship, and I am at a standstill. There are constant wraith's and ghosts coming and they never seem to end. How in the world are you supposed to get past this part?
It was actually pretty easy for me. What I did was get the Gauss 'Hog and drive it into the Mammoth. From there I just shot throught the various openings until the game stopped spawning Ghosts and Wraiths. I mostly shot through the side door, but I would also back the 'Hog out one of the Mammoth's ramps and shoot from there too.