It wouldn’t be enough to simply increase the level of the enemy troops for Explore Difficulty 13 or higher. There would be more gold rewards, more mythstones (approaching 100 so you’d always fight a boss), more tokens, better token quality… but I think the difficulty would need to have something else added to it. Give random enemy troops things like Stealthy, Empowered, Barrier at the start, Ice Armor (65% Skull damage reduction), etc. I think that’s the only way to actually make it balanced. I’d love more rewards with more challenge behind it.
Some empowered troops would be unbearable … whitehelm paladin for instance can already oneshot you if he doesnt take damage before casting.
Please add markers for troops with added Boss Traits, though, including for World Events.