I developed an easy strat for completing Frickbears 3 Lunatic difficulty DEATHLESS. Basically in a synopsis we need to take two kinds of animatronics: camera niggers and vent guys, then we need to deathcoin Puppet and Foxy.

The challenge is divided into stages
Stage 1: grinding (night 1 - night 2/3)
we play minesweeper as much as possible and get these shiny gold tokens to convert to dollars, so we can buy a Spawnkiller and All Ears and preferably Flashlight.

Stage 2: the rest of the run
We flip up monitor up, complete minesweeper, buy deathcoin, kill puppet and foxy, then flip down, deal with golden freddy and toy chica, and then for the rest of the night we sit with the mask on and listen for cues to close the doors. That's it, easy win.