Instead of spawning one less Slim and one more Black Jack after each Jackbot, why not just increase the number of bots spawned overall? They could have it so after each Jackbot spawns, instead of one less Slim and one more Black Jack it could be two more Slims and one more Black Jack after each Jackbot. With this it'd be two Slims and one Blackjack. Jackbot. Four Slims and two Blackjacks. Jackbot. Six Slims and three Blackjacks. This would make teams have to pay a bit more attention to the robots as they could easily overpower a turret defense after a short amount of time.