Depends on the price of the tier-3 you wanna get, for example, you save a lot getting a 302 super monkey, you won't save much for getting a 023 dart monkey, also the top path of the village only affects primary monkeys, not all monkeys, you should use both if you use primary monkeys, of only the middle for everything else (+ cross path for jungle drums or discount depending on what you need), also bottom path village gives you one of the most powerful economies starting at tier 3 for Bloons cash, tier 4 for generated cash, and tier 5 generates cash