New units in Necropolis. Discussion and selection between upgrades.

The only alternative creatures I focus on are the new liches with Raise and Banshees, but I prefer to create Banshees in the later stages of the game because they are more effective, and alt-liches with Raise are very useful for clearing maps early on without losses...
Second-tier vampires - not good, in my opinion.
Zombies - the first tier are better.
Skeletal Warriors - I don't want to give up having 2 archers.
Ghosts - the old ones are better.
Dragons - well, even though "Sorrow" is good, I still rarely keep them in my army...