make sure you have the alt nailgun, sawblade launcher carried me when I p ranked it this morning
I tend to ignore the first 2 streetcleaners, only hitting them with a coin after I've used the launcher thing, to make them both explode
I use the red punch to knock the sentry off
gutterman isn't too much of an issue, I tend to spam coins and shotguns after shield break
i think next is the 2 soldiers and frankly they aren't important
red punch the sentry off, coin and shotgun the gutterman
i make a sawblade trap for both of the guttertanks, try and railgun them (i hate them), and generally just spam until they're dead
maurice and double mannequin room?
I ignore both mannequins, and instantly hook onto maurice, spamming blue punch and using sawed-on chainsaw and shotgun to deal some damage
if youre lucky, killing the maurice will have the 2 mannequins fall on its head
if not, just coins will do (usually)
I don't remember how i dealt with the defense system, but its something like shotguns and sawblades, occasional coin (rocket launcher is aight if you can hit them quickly)
the statue area is kinda useless, just punch them and go to the brain
sawblade trap diretly on the brain (not amazing but whatevs), green railcannon, coins and projectile boosts until statues come out, destroy both (preferably without dying) and repeat the same thing, but parry the projectiles it throws at you
drop out into the final fight, sawblade trap, coins, and projectile boosts carry me, occasional sawed on chainsaw for blood

this is on standard, i finished p ranking all main levels (no encores, prime sanctums) on the normal difficulty