Dude, I have never been so impressed in my life XD The fact that you remembered the class of the Autumn is amazing XD Tho I think your forgetting that what made the Autumn such a prime choice for the chiefs mission was it's structure. The honeycomb steel frame inside the ship would hold up amazing against the Cabals kinetic weapons. They don't have any directed plasma weapons so the Pillar should suffice And plus the chief and his spartan 2s could just high jack a few Cabal ships with some precise jet pack work and boarding. All they would need to do is link Cortana up and sit back and watch the fireworks XD