On your first serious effort, just go the monk route. They’re significantly faster than every class, allowing for tons of leeway for errors. A couple seasons ago, I made an attempt to avoid just using standard map knowledge, and did 100% clears of every map to get an idea of what should be a worst case scenario, and ended up around 1h8m for a full campaign run.
As to the monk, I’d probably also suggest going the speed bell monk approach, as you can kill stuff without needing to be accurate, and they get nearly infinite dashing strikes. Going pure dashing strike requires some resource management. Plus, the bell monk approach is a lot slower, which, while that sounds bad, makes it easier to learn with, as sometimes, you can be going too fast. Plus, it’s also much easier to gear for. Half the pieces are optional.