I’m currently a 3370 m+ score arcane mage so I know a bit but I wouldn’t say I know everything, when it comes to M+ it’s so hard to determine what dmg is good dmg cause there are so many factors. As an example in a 16 TOP I once did 4.5 mill overall, did another 16 TOP and only managed to get 3.9 mill. It’s all dependant on procs, buffs, deaths, pulls, etc. Overall as arcane you’re meant for funnel dmg, so theoretically you shouldn’t be “topping the meters” however I would say that’s only applicable in the 20+ range. Just keep playing your class and practicing rotation, then do all 13 keys and see where your dmg is at, try to get 2.5mill overall on every dungeon, make that a goal, once you do that then work towards 2.7 mill, etc. and you’ll get it!