fist you play a round and with some luck you get two tokens one is 2 milk per turn for one tower and the other one giver +1 attack and +1 hp per milk per tower then you start the game and place a cat the secend spot from the right and the milk tower left from the cat use both tokes in round one on the cat if you dont get a cat at round one wait for round two get as fast as you can a witch for the 2 milk potion thats it but you also need a little bit of defence so you do not die if you are in the lategame and have all the upgrades you need just get more witches or use reroll for as much milkpoitions as possible

i got up to 1.4k attack and 1.5k hp and it was able to kill the final boss by it self

two tips for the gameplay:
1 upgrade you cat as fast as possible so that every milk gets you more stats
2 i could be that you need some defence against the normal waves