I think Mystic could use a new ability, “Seance”, which would encourage the dead to stay in the game. It would replace Conduit, which seems weak, with a 1 or 2 use Night Ability that allows one OTHER person to Commune with the Dead, Mystic cannot see what the dead say, only the person he links with. This means he has to be careful who he chooses.
Just an idea on how to make it more interesting for the dead peeps.