The whole concept of power level doesn’t really apply to someone like marsh, because he can store “power” in his metal minds. With the help of compounding he can effectively turn money/metals in more feruchemical speed and strength. Compound enough speed/strength and he becomes the flash, with super strength and atium.
At which point power comparison is meaningless and the question becomes can his opponent be incapacitated through physical means? If yes then Marsh win. If no Marsh can run away very fast.
So depending on how much he has stored, I would rank him anywhere between grumpy mistborn to Hoid tier.
