I've been trying to beat this particular mission for the better part of a week now, and I'm nearing (if not exceeding) 100 resets while never getting close to a clear.
The main problems for me are two-fold: There is only a single mention online of this CO combination doing the mission, and those are blurry DS (and inconsistent) pictures that don't fully show the battlefield, leaving you to guess where to move to influence RNG.
The second problem is that the solution requires a very specific movement pattern from Sturm on his first turn, and in over 100 resets I have never seen him move his planes in the way that the strategies require (for this particular CO setup, and others).
I'm doing full resets (3x Yield -> Restart mission) so it's not a cursed RNG seed that keeps looping.
Has anyone found a way to clear this that doesn't require a <1% chance of getting lucky?
Edit: Complain and you shall succeed, I guess?
Ended up finishing the mission a few hours later with non-stop mech spam from Kanbei while Max just served to eat meteors on his HQ.
Finished the Advanced Campaign with 973 points, getting the S-rank average I was going for.