I don't think you can ever go wrong with picking up the profession that allows you to make the gear you use. Historically this has allowed for very good starter or better epic pieces despite blacksmithing. With that said, I'd go tailoring on the priest and two warlocks and leatherworking on the druid. Blacksmithing on the pally is a personal choice as it allows for some really good pieces as well but no sets like the others. On my pally I have blacksmithing as well as engineering because the helm is awesome.

Enchanting is a given particularly for a team that looks more geared towards pve like yours since you will be probably be running instance and getting lots of BoPs.

JC is a toss up unless your min maxing since you can just buy the stuff other than the BoP jewels. Inscription may be the same and herbalism is definately the same.

I personally have every production profession and no collection professions since I can make gold and buy stuff quicker than I can farm it but while leveling I did have collections. I also intend to drop tailoring for inscription. Obviously this goes against what I said above but I'm kind of a completionist and like being able to do everything.

If your not a completionist I'd probably go:

Pally - Eng/BS
Druid - LW/Skinning
Priest - Tail/Ench
Warlock - Tail/Mining
Warlock - Tail/Herbalism