Best freeplay strategy?

I use asmany max temples as i can (17 in monkey lane) then 4 2-4 ninjas to slow down the bloons, 8 2-4 ice monkeys to slow them further and the rest of the space with 4-2 bloonchippers set to strong to stall the blimps, is there a better strategy? Im at round 280 and moabs are already way faster than pinks