I am just getting back into the game and considering what class my character may want to multi-class as next. RP wise, I could see Mordocai possibly going for Indorani, Praenomen, or Carnifex. Note, I only plan on ever having two classes and will likely wait a couple RL months to officially multi-class. Whichever class he chooses he will likely consider secondary to the Reborn, as he truly believes they are the greatest "mortal" power in the realms.
First question is: Can a bloodborn multi-class as praenomen? If he can, then would it be worth it? From a RP standpoint Mordocai is fascinated with the powers of the Blood and would be interested in being able to study/use Sanguis personally. This is probably the strongest RP reasoned choice, but I want to balance my RP goals with gameplay and am not sure if Sanguis would add much.
Mordocai would also be interested in the Indorani. He is attracted to all the darker arts and Domination in particular is interesting to him, as well as necromancy. The little I remember from the guild's purpose would also match Mordocai, though the help pages on the guild provide little information. As far as gameplay, tarot seems to add great utility and Necromancy/Domination sounds pretty fun.
Finally, Mordocai revels in slaughter so with the attitude of the Carnifex (from what he has seen since he re-awoke, they didn't exist before) and their powers over souls Mordocai would be quite interested. Gameplay wise I think the warhounds/soul powers sound interesting.
Any advice/ideas would be appreciated.