Tactics against Necromancers.

Usually people play on Queen (160%)!
They don't play on King (200%) because it drags the game out and a lot depends on the map—for example, if you didn't find a certain resource, you fall behind in development...
Some templates play on Rook (130%) to ensure the fastest possible start and speed up the game!
They don't play on Knight (100%) or Pawn (80%) due to the inadequate behavior of neutrals :)

with good luck you don't even notice 200 difficulty, but if things don't go your way, it's all over! I liked 160 more; there are no development problems for the Dungeon there
we played online without any restrictions, simply because nobody played Necromancers, they weren't nerfed. And when the number of DD is not limited to one per turn, the tactic where every little negro in his own corner with 1 tunnel gathers skeletons can really fail because they'll be cut down one by one before you give them to the main hero; because of this, I haven't encountered the problem of "come and hang yourself" with 4k skeletons
ps regarding the development scheme, of course it will have to be revised; I looked at the saves, a lot is unclear, but the General algorithm is obvious, I'll figure it out