What are best strategies for btd battles

Early game: get as much banana farms as you can. (If you can, use a monkey farmer agent)

Mid game: get at least 1 troop of every type to kill every kind of bloon (bomb tower, ninja, wizard)

Late game: try to get a few Temple of the Sun god's on the field, by this time you should have lots of money to sacrifice upgraded troops.

Then just hold off, the more super monkeys the better (preferably the sun ones, the robots are okay too if you prefer)

Defend and taking out you opponent as fast as possible and save some extra before rushing he might also rush