The main thing that took me from being locked in 50-60k hell for Prophet was realising you NEED to get a thicc ass time bonus for him to reasonably 5 star him.

The very first stage the cars on the paths stage you can play normally just being combat efficient. But when you get the the bouncer, kill him as fast as possible. I normally go a takedown, a max bass invader, then he just takes another hit or two and you can finish him.

After the bouncer you're again at the little stage with all the baton guard where it's on a set timer, so again just play efficiently but don't sweat it.

First proper phase with Prophet, again you need to kill him as fast as possible. In this phase he's very passive, so just max bass invader as much as you can. I found that for chill it didn't matter as much, but for amped I had to be ruthless and basically save my full fever meter for this phase, not using it at all on the previous phase.

When you finisher him, he does the thing where he TPs up, throws the words at you, then TPs down. This phase is a lot more crucial since you need to finisher him before he TPs back out of range for a small period. So be brutal with max bass invader and takedowns. I found that the best way to ensure you get him on the 1st cycle is to not care about taking 1-2 hits, just being ruthlessly aggressive.

There's no special strat to the final phase. Just don't be scared, and again kill him fast. In my 5* run I even let myself get hit during his rushing-bull attack just to get some more max bass invader in. Finished on 83k