allow only your level to be treated in combat.
leave the possibility of tactical treatment, remove the opportunity to enter the hilobot.

And I would leave the treatment, but only +-1 level and limited the Persian to the heel, say level *hp/2, i.e. 9ku with 800 hp 9*800/2=3600, ten with 1000 hp - 10*1000/2=5000 ...
But 9-11 levels can beat the top ten.

normally the subject of hill is limited to persian.