OB1
Jedi Master
Another thing I forgot to mention on the original post but that was another thing, he was using those as dexterity checks because of the monk's martial arts feature. The dm said it was ok, but again I dont think that is how that is supposed to work.
Curious as to your goal in asking the DM to revise his rulings in this. Clearly it’s a benefit to the PC and the party. Are you concerned that he DM will be unable to challenge the group due to their ruling on this?
Seems like a fun ruling that goes with the spirit of a martial arts master. And should it make combat encounters to easy the DM can always add more monsters.