Fortress versus Necropolis.

Please describe the situation more specifically. What map are you playing on? Is it possible to avoid a late-game scenario? Generally, with the right spells and Necropolis upgrades, Necromancers can overcome any challenge, or why not? If a late game is unavoidable, please provide information about the armies and levels. In general, Necropolis is a terrible race to play against; just try playing on maps with powerful neutral creatures, for example, on standard templates (or download maps by Moz).