Posts from Necropolis discussions.

Inhabited mines are, in my opinion, completely unnecessary. What can 25 ghosts do (and that's at the maximum level)? They can only protect against some minor hero running with a single unit.
You can spend that slot on something more useful, like Banish or, even better, on Fire Warriors.

I'll add something about necromancy: there's a skill in "education" called "Master of the Dead." It's not top-tier, but it increases necromancy by 5%. I rarely take mentorship, but more often this skill, especially if I'm playing...

It's better to take a mentor and level up secondary heroes (and give them education with mana attraction and dark revelation) and you will have a lot of dark energy... and 5% to necromancy will be just "a drop in the ocean." You can even ignore the Skill Academy.

Basically, everything is as described, but I always want to develop a hero so that he has no equal in battle, and the Commander skill is extremely helpful in this.

in the Tribes of the East, a mentor appeared on the map, an old man with whom you can change any skill.