Honestly, I still don't understand your point about morale for Necropolis – you need to focus on education, sorcery, logistics, and dark magic with either defense or attack, along with general haste. But overall, the situation in the late game is quite unfavorable.
Added after 4 minutes
Besides, who said that a Dwarf wouldn't boost morale against Necropolis? This is a fundamental ability of the light factions!