I'm a bit confused on this matter.
I have read it takes about 6 days to become a level 6 vampire. I have also heard that doing attacks and vampire actions that fall under the skill line will level you.
However, I haven't really found a definitive answer to this. I have at least one Vampire ability that I will use every fight, and it appears as though I am leveling with the attacks. On the other hand, I may not play as much one day, and yet I'm leveling a - perceived - similar amount.
So can anyone tell me what is going on?