I was just wondering if it really matters what you do. Like, if you do a normal dungeon versus a mythic dungeon, would the mythic dungeon increase your chances of acquiring one? I know there is a 'very slow build up' hidden system that keeps adding up on the class and spec you have so I was curious about this. If so, then I'm guessing Rated BGs, Arenas (both with higher rating) and Mythic Dungeons are going to be the most optimum to increase that build up in the hidden system.
If I'm wrong about something I'm all ears. I just want to figure out the system. Also, if you completed all the main chain quests in the five zones plus your Class Hall would that factor in as well?