Quote Originally Posted by davidmage View Post
And the way those mythic+ works, do they scale with iLvl?
They do not. The difficulty of Legion's Mythic dungeons is determined by the keystone you use. There's a base difficulty, a little above the Legion heroics, and after that they simply get more challenging based on the level of your keystone and whatever modifiers are active at the time (e.g. giving mobs extra health, things like that). Chances of better rewards increase as the difficulty increases.