Ancestral Ways is the third stage in Quarantine Isles.
Throughout the stage, increasingly strong Zombie enemies are sent out from the enemy base, starting with Znache and ending with terrifyingly strong Zories. Kory appears when the base is hit.
Sniper the Cat power up can shoot the Zorys, causing them to not burrow. A hypermaxed Manic Flying is definitely a valuable asset in this level, also try to stack Manic Macho Legs to clear peons to allow Sniper the Cat to hit powerful zombie enemies.
You can also clear this stage by spamming units with decent damage and time between attacks (Like Kasa Jizo or Baby Gao).By stacking these units,you'll deal enough damage to knock back zombies when they are about to burrow,making them to not burrow.Also,they will deal a lot of damage to kory,reducing his health.A strong uber is recommended to take out the kory quickly in case he plows through your defense and reaches your base.
There is a time limit in this stage, at 3 minutes all zombie enemies (except zoge) will stop spawning, giving you a chance to fight kory without having to worry as much. This is probably the best way to beat the level on 2/3 stars as well, unless you have the ubers to deal with everything.
Strategy 2 (ft. Cat Machine Mk 3)
Row 1: Weedwacker Cat, Ectoweight Cat, Hyper Mr.*, Skelecat*^, Necro-Dancer Cat^
Row 2: Cameraman Cat, Octopus Cat, Li'l Flying Cat, Housewife Cat, Cat Machine Mk 3
Combos: *Biohazard-Research Power Up (Sm), ^Bony Bone-Research Power Up (Sm)
No Battle Items needed here. Even Speed Up isn't recommended, as managing your cats to keep from hitting the base too soon is important.
Start by leveling your wallet up to 2, then summon a weedwacker and an ectoweight as soon as you can. Wait until a burrower gets past them (or they get killed) to summon a cameraman cat. Build your wallet as you go, making sure you don't level it up TOO fast and use up all of your cat summoning money by doing so. Of your cats, these are the Area attackers that are also Zombie Killers: Hyper Mr., Skelecat, Li'l Flying, and Housewife. Summon one of them occasionally, along with Weedwackers and Ectoweights to slow the zombies down, and Cameramen to block while those 2 are recharging.
When it looks like you're going to be hitting the enemy base soon, summon an Octopus Cat to block Kory's shockwaves when he comes. After Kory comes, build your cash towards summoning Cat Machine. After Cat Machine arrives you can stop summoning Octopus, as C.M. will do all the shock-blocking you need. At this point, summon at will and Cat Machine should be able to beat the enemy's base.