I also love Deleb. No need to comment. Although, yes, with comments: Deleb is VERY good, especially for the early game. With her ballista, she can clear out groups of small neutral creatures, usually reaching level 2 or 3 in a row. Especially if the AI does its usual silly thing: clustering together. Also, Grol, the master of hounds, is great in my opinion. I try to build succubi, then horses, and cave lurkers as quickly as possible. Then I upgrade them. Usually starting with higher levels (but sometimes I upgrade level 1-4 first if I really need to). Especially demonesses are helpful (when playing against non-demons). Cave lords (and I prefer lords, as they cast spells) are the trump cards of demons. Archdevils are left smoking nervously. Oops - sorry, I got carried away from the main topic. In short, get to the higher levels as quickly as possible and without upgrades.