How about making a mythic specific to endless archive?
My idea: you can select and bind any one vision to the mythic so you can run that vision from the start.
The vision would be bound to the mythic until changed - this could be purchased/changed through the endless archive currency and/or have a cool-down between changes
The mythic could empower or even slightly nerf different visions to make sure the different visions are all somewhat equal and to not have just 1 meta
I think this would add to the endless archive experience and add to the diversity of builds you can run in there.