Necropolis vs. Stronghold

Please tell me how to defeat a Stronghold with Necropolis.

I'm playing on Medium or Large difficulty, and both of us are focusing on development.

Is development building a town on the first week and a capitol on the second?

Build troops! No towns on the first week!!!

Build a Mage Guild and an Enhancer in the first few turns. If a hero like Shakti appears, it makes sense to build a Skeleton Converter and transform those units into skeletons.

Of course, don't give your main hero anything except logistics until you max out expert necromancy, not even earth or air magic.

And in the first week, you should be aiming for something like knights in the Stronghold/Fortress (chocolate) or liches in the Stronghold/Fortress.

Or just vampires in the castle.

Ideally, upgrade the vampires to level 121 (practically no losses in battles). Then you can use your second Necropolis hero to gather skeletons. If you're playing on Heroic difficulty, you should have a lot of skeletons. And even on Large, you can get a good number.

(Don't set the goal of building Bone Dragons, they're not needed).

Of course, if you find other Necropolis castles on the map, build an Enhancer in them right away.

Something like that :)