Dungeon power level

Hello, i wanted to confirm if there is no issue by power leveling in dungeon, my strat is to get a high level healer we both get in dungeon, i tag all adds he leave group and i kill them alone, his only job is to keep me alive.

dungeon spamming isent optimal for speed right now, shouldt run into issues as a healer but it will be so much faster to quest in terms of time investment.
you could also wait for the 3rd of sept. theres gonna be a timewalking week so the queues should be much better with better exp rewards.

im talking about classic mop bro xd, i heard you get lvl max in retail in about 5h xd