Combat without dice/with minimal dice strikes me as, fundamentally, a desirable question.* I know I'd like to see answers to it! But I wonder if it's an XY problem. OP seems to have a simply-identifiable problem: "We like playing 5e in lots of ways, but would like less rolling in combat." And they've identified using the DMG's "minimal dice" guidance as their route to take.
Should we be advising this user that they should simply pose their problem, and trust that if "use the DMG's 'minimal dice' guidance, here's how I did it" is a good answer, it'll come?
* - It looks like we don't have a good, canonical question on making 5e combat less of a grind, believe it or not.