depends on if you can find the mats needed in the AH.. Wait till max level and do dailies for gold. Then like everyone else said. Powerlevel them with the gold you make from dailies. Don't bother leveling up the professions until you know for sure that team will be played.
On the ally side I have all my professions on my mixed team but they are at lvl 70 and I doubt I will level them any further. Sucks. lol. Now I am trying to get professions on my lvl 80 team but the AH doesn't have much currently in the way of mats.. so I will have to farm for some of my mats. Farming is definately painful.