Foxy Rushes you 3-4 times?! No wonder you dont have power at 5 am! For me, at least, she only gets out 2-3 times with the 3rd beign nearlly at the end of night.
I'm not shure if you know how to deal with freddy so im going to go with a really brief explanation on how you deal with her in 4/20: when she is on CAM 6 she will not move as long you leave that camera selected, even whille you're not on the cameras. She will only enter you're office if you are not on CAM 6 and if you leave the door open. Since foxy gets stalled when you open the cameras (no matter what camera you are in) you can stall the two at the same time, and if you need to check foxy you can close the door on the right so freddy doesn't get in. You can also use the moments when chica is at the door to check on foxy.
That is how I deal with both freddy and foxy and I even think its the main strat in how you deal with both of them in FNAF 1.
If you want I can tell you a little more about the strat that at least I use to beat 4/20 in this game.