I find it very easy to level myself in this mod. You can quickly replace Acolyte's set with Necromancer's, which makes you pretty much unstoppable if you know how to play, regardless of level. Then you just move up from there. You are most definitely not supposed to fight Werewolves/Vampires with Acolyte's gear. I personally skip everything in between and go straight to Shadowlord's, then Lich's gear. Go and hunt acolytes, who are accompanied by patchwork and undead, they are plentiful and not hard to kill, especially if you get some undead troops of your own.
There being a good guy option (Templar, Paladin) has been requested a lot, but IMO, the main point of this mod is that you embrace the darkness and use the vast power given to you to bring terror to Calradia, not be the holy savior.