If you're looking for strategies on erebus (the vampire general) do some reading on guide threads. the game replays strat is pretty handy:
http://www.gamereplays.org/demigod/portals.php?show=page&name=Demigod-Strategy-Guide-Lord-Erebus&st=4
Personally I lean to a heavy crawler strat backed up with bat swarm (bite goes without saying and is always first upgrade when available).
Almost equally important is to read up on OTHER players guides so you can get a feel for what you're up against (and learn to watch for torch bearers fireball and carry some pots/shields)
