Had a Krisk vs. Krisk again today and i had to breaked it up after over 20 minutes. Other games "penalized" those fights over 5 Minutes step to step to 1000% Damage. It can be so easy to solve tis problem...do it Plarium.
on a side note, I was in classic arena, the opponent was apothecary alone. man he gave me a hard time but ultimately i defeated him. kept on doing soothing chant for god knows how long.