You have an adjustable gas block, drill the gas port up just once to the appropriate diameter and use the adjustable gas block to regulate it to whatever extent you wish. You're defeating the usefulness of the gas block by trying to upsize the gas port incrementally. Technically you could go as high as .125" in a gas port and still regulate it as needed, but you don't need to be that drastic. I'd drill it up to a 3/32" (.094") and use the gas block as it was intended.