but

minitanks would

minitanks would be the problem here, particularly the Mark IIs, which were almost impossible to kill even with the 40mm ammo. The pistols were actually more effective against the Mark IIs–the pellets ricocheted off the floor more reliably, giving you a chance to hit the vulnerable underbelly. Mines were the right answer.
The minitanks were physically broader than the guards; they'd be the last things through the opening. That gave him a chance to plant the mines with a higher chance of nailing the tanks and not wasting them on the easier targets.
Feverishly, Lou laid out a plan and posted it to the 'castpoint.
* * *
The headache now felt like a series of low-yield nukes going off in her head, but Jessica hardly noticed it. She watched the new prediction take form on the 'castpoint, that Roni could lay a minefield in the right-hand side of the hall and take out at least one-third of the minitanks. There wasn't any time for watching a bunch of traders reflect on the correctness of this plan, but she knew Morgan would go with it. "Hurry the mines," she whispered.
* * *
CJ might have had the fastest reflexes in history, but she was still busy organizing the barricade when the first roboguard appeared. So Akira scored the first kill: a pair of pellets from his pistol caused the guard to stumble, and a third shot went home under the exposed lip of the breastplate.
Two more roboguards crowded through the opening.
Morgan's voice once again came through. "Roni, duodec. Ten one-centimeter charges, pressure caps. Plant 'em on the right side of the hall in two