Mithras - What to do with him?

Dagon's Call. Punch for 3, plus unpreventable 1 during press step. (subtle is my humor...)

His bleed is already at magic number 3, all he needs is untap potential and things to do while untapped. Given FOR, he has plenty of untap potential. Given Foul Blood and DOM bounce, he can mess with others on their turn.

Oh, and he can power bleed, too. But it is probably easier to splash a little extra bleed and block denial than stack it to the rafters. Archon's Investigation is a thing I hear.

Since you want to include some crypt acceleration, a big cap crypt with and looks appealing, especially if the other vampires have votes and/or additional strenght and/or bleed, too.

Thus, Mithras' friends could be:
Ignazio Giovanni, Lisandro Giovanni, Lady Constancia, Luca Italicus and Hardestadt.
(I don't consider Marcus Vitel adv., since he offers no benefit besides the disciplines.)