I've now come to the conclusion that Cori-Steel Cutter is not simply OP in the current meta, but "fundamentally broken" and needs a ban.

The card would be fine if the equipment attaching was free for the first Monk, but cost 1 colorless otherwise, or if it cost 3 mana (e.g. Monestary Mentor) or if there was some initial spawning ramp-up cost (e.g. Drake Hatcher).

Instead we have a {1}1R rare artifact "prowess token" free-equip insta-spawner which is an insane power-creep and, to my knowledge, unprecedented in all of Magic's history.

This card is now on my, very limited, personal ban list and I refuse to play with or against it.