Damn, I'm surprised to see a Lunacid post on Lemmy
Edit: I recently did a playthrough with a vampire character. I kinda power-leveled some stats though, basically just running my way up and down the game's entire map killing enemies over and over. I got into a decent rhythm for the combat because I had a decent enough Dex so I would just jump to dodge certain attacks if I couldn't kite them.
Certain spells can be pretty OP throughout the game if you focus on your magic skills. Flame Spear can honestly carry you through most of the game if you focus entirely on magic.
All that said I actually liked the Vampire "class" as it felt a bit more forgiving for most of the game (except the sewer area). I'm kinda working on collecting all the items so I can get the last ending.