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For today's Daily Challenge "Purple and Blue", use the fact that Camo Bloons inside the shaded area around x | 2 Sniper Monkeys CAN be targeted by 2 | X Monkey Subs. So by placing Sniper Monkeys at strategic locations in the track, your Monkey Subs should be able to take care of the Camo Bloons. If all else fails, you can also use Ice Monkey's Activated Ability to freeze all Bloons, including Camo Bloons, to give your monkeys extra time to attack the Camo Bloons (best to use the ability when the Camo Bloons will freeze beside the Sniper Monkeys so both Snipers and Monkey Subs will continue attacking the Camo Bloons).