Manuals for playing as Dungeon

Well done... I see your skeletons go first, huh? They move before everyone else.

Sometimes they do. The Necropolis doesn't have very high initiative, and the Banshee's Cry and amulets that lower morale still exist. And how many skeletons can you kill with the first Armageddon if they have at least 7 hit points instead of 5? What about Raise Dead? I raised 200 skeletons, and did you often deal more than 1500 damage? And by that time, there will be a lot of skeletons.

in a battle with a warlock, your skeletons won't move at all. Storm Master + Enchanter (in the worst case) know their job.

I agree, the chance of resisting a warlock is small, and there might not be a dispel, so the skeletons will be stunned. But their phantoms will attack for them; you just need to cast them at the right time (after the warlock's turn), otherwise, there wouldn't be any balance, and all 6 castles would be equally strong. In general, in Heroes 5, the highest-level monsters don't decide the outcome very much. They are just a strong unit, nothing more