compared to the og fnaf, this is infinitely harder. you can be on freddy's ass the entire time and she'll still be fucking moving around. foxy requires the occasional check on, otherwise just keep cams up on freddy. you can literally be looking at freddy, pull down cams and immediately get her jumpscare. also foxy takes away 15% of power if they do end up running.
i geniunely do not believe it's possible to beat night four without cheating, using cheat engine for unlimited power will wipe your save, not just crash your game, your save data will be wiped.