Seriously, it's too damn hard. The checkpoints are few and far in between, and the knights are just to OP. It's not even that I suck, because I beat Reach on legendary solo, it's just too damn hard.
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I'm almost finished with it. Doesn't take more than 1-1 1/2 hours a level. Hardest one so far was Reclaimer when all the ghosts and wraiths are being dropped and the gauss hog was already blown up and I had to kill them all with assault rifles and magnums.