If you are deployed, build some basic structure of your defense.
All you need to do is, watch youtube, play card game and eat pop corn while not looking at the game, my game reached wave 115 without looking, by starting to prepare since wave0 till wave 16.
Build bunkers with gunners inside, a zook from a random crate which i don’t really need.
Build 6 tnt along with 6 booby trap (2 of them already booby trapped)
Put your officer in the pill box, your soliders in trenches cover in cam net.
Then let them be , I don’t need to see it!