The most challenging part for me was the battle against the orcs. But unfortunately, in version 3.1, it became impossible to stop the heroes, and they also took away Gotay's cyclops =)). As a result, I had to replay the mission three times before I realized that I shouldn't eliminate the Archdevils immediately...

However, the mission itself doesn't present any major problems. I captured the Claw in three stages. The first stage involved a "plate" formation with Dark Elf troops, and the second stage involved Nazir with the entire Academy army that couldn't fit with Zehir. As a result of these stages, both stacks of devils were destroyed, and the rest also suffered significant losses... In principle, I could have captured the castle without these "stages," but I needed to find a use for the remaining army ;) Then, with Zehir, I cast Chaos on my enemy (although I could have just attacked directly)).
Zehir had the following artifacts: golden horseshoe, 6 artifacts from the dragon set, tome of power, sandals of the saint... I gave the tomes and low-quality artifacts to the "staging" heroes.