[Canon reeves]

Several harpoons on a 6 CIM swerve drive that fire into the containers on the step, and pull them in. As well as a giant airboat fan that blows over the opponent's stacks.

Not really, I've been thinking about a conveyor that goes up from the chute enough to put the containers from the chute into a cage that forces them to stack three high, but there is no bottom to the cage. So after getting three totes, we drive them onto the ramp and open an end of the cage and back out.

Or, a more complex way, that doesn't involve conveyors. To do this we could put totes in upside down, then have them slide on a bar that is the same length as the tote, but pivots just before the center of mass. At the end of the bar is a small lip, so the totes catch, and flip, then slide almost vertically into a forklift that is leaned way back. Do this three times, then just raise the forklift and bam, at stack of three.