I've been trying my DAMNED BEST on AotD and nothing's working!

Maps on BO6 weren't too terribly easy but I had no real problems grasping them after watching a video and several practice runs. (Except for "The Tomb", it ate my lunch for a bit!) Granted, I don't have the time I used to, I've solely been on this map and have gotten so close with no luck.

I've done practice runs on standard, a couple of successful directed just to make sure I had all steps correct, solo and squad, doesn't matter. That last fourth of the boss's health has never been cleared on directed on my screen. Last night's run was damn near perfect. Wasn't the first person in a long time that knew all the steps, squad had almost no downs within the 27 rounds we played, manned the turrent and had a great driver in the boss fight, AND. GOT. SWEPT.

What are your best tips for demolishing this boss or optimizing this map better?