My thoughts on MC, and Michael.
MC: I doubt he will evolve to his 4th evolution prior to mastering his memory trait until somewhat close to "3rd evolution tier" just because i intuitively feel that the balance would be far too tipped off his genetic monster makeup.
Michael: I, unironically think Michael has the potential to become onpar with MC or even stronger. That sexy grey alien bitch informed us that Authority, the daddy of the 1st and 2nd apostle was the strongest one out of the other kids on his parental generation. So I assume its only logical if someone with a very combat mind that gets some SSJ69420 2nd apostle powers becomes mega broken to the point he will be the one to fight Indra.
