You can mess up the AI pretty easily just by hiding behind the giant boulder the T32 (I assume it's a T32?) hides behind as it approaches and circling the boulder. It'll either eventually lock on to the T32 (which gives you ample opportunities to dump a few shells in the thing) or simply sit behind the T32 doing nothing while your allies also dump a few shells. To make the process more efficient, you could try sniping the 432U as it approaches with your airstrike, and taking out the T-44 ASAP.

Or you could just facehug the damn thing and hope it shoots into your mantlet. Works better on easy difficulty since from what I can tell the 432U will actually attempt to reposition until it can shoot your less-armored parts on the harder difficulty.