Fate of the Vaal feedback and league idea

Fate of the Vaal is amazing.
It really makes this game the best ARPG i have ever played.
Being able to customize your own dungeon is a huge innovation and i love it.

I have a suggestion.
I hope the developers are familiar with a game called "Kingdom under fire"

Imagine a league where you are able to customize your own mob,
to battle against an enemy rogue and their mob. A big battle between the two, where you can select models to add to your army and enchant.

maybe there could be a special league item used as currency to pay for mobs and upgrades.

The enemy mob could mirror your mobs difficulty, for example- if you have a rare mob, they also have a rare mob.

the higher difficulty it becomes the juicier the loot drops from the rogue, if you die you get nothing.