RTF is a global modification that replaces all towns in the game.

Fallen angels from Darksiders would be a perfect fit for the concept of blood huntresses. And there are also bats in that game, which could fit into a new Necropolis.

Oh, I haven't played it, but I saw these games in the list of available games to extract models from. I'll take a look and see what's there, thanks!)

Added 8 minutes later
I checked the lists, and I can only extract models from the third part and Genesis using the programs I have. I'll check who's in these games.