Cant complete bonus stages because of stupid scaling

Seriously how am i supposed to beat an enemy team that scales to my LV x 3 team, am currently lv 14 team wise and i cant beat the stage 4 challenge because its an enemy team of i think 2.5k to 3k hp and all their skills dmg scale to my lv 14 guys like WTF!!!

And another thing for some magical reason the lute doesnt trigger at all in those stages so 50 dust wasted on each try.

Put a LV cap on each stage to make progression reasonable.