I tried it too, equipping Mutare with a skull helmet to prevent him from equipping Power. The Djinns don't want to cast anything at all, and they eventually get killed by the Azure Golems.
But theoretically: if you apply Frenzy to stunned Azure Golems under Berserk, won't it disappear in the next round?
P.S.: It should be understood that Berserk won't last forever. After 300 (approximately) turns, it will disappear and need to be recast. Therefore, you need to understand that this option is not infinite, and it's not enough to simply get 51 stable damage.