Oh, don't worry about it. It's not a matter of concept-crowding. The character is still in flux and the exact role he would play in the Tremere hierarchy is warring with the wind focus (possibly through Mythic Blood).
Still have an open slot?
I'm afraid there are 6 players at the moment (two via pm), so probably no (unless one of them fails to finish a character, which I think is not very likely).