Where Do You Grind To Get Mythics?

I quit when mythics came out idk how you get one since I never saw them. Are there places where a lot of mythics drop?

 

grinding mobs is a bad idea.
go lootrunning

 

spot on.

Lootrunning (if you don't know), is basically going through a route that passes by the most chests. Typically in a high level area, as that's where most of the high level chests are. Loot bonus and quality affect chest contents, but more so loot quality. I suggest looking up some video tutorials on different routes people take and choose what works best for you. Personally, I've found 2 mythics at sky islands.
Now if you're set on grinding, well... all I can say is good luck. Frozen heights used to be a popular spot, not sure what the new meta is though.

 

Before mythics came out there was no good motivation to loot run but I guess I'll try it out

 

just dont be surprised if you find nothing