I really enjoy professions, in classic that I recall nodes are tapped so only 1 of each gathering prof is useful

there are 9 professions total, if I have a 5 toon team, that leaves an extra slot, is there any profession that benefit from having 2 ? (initially I thought about alchemy specs, but that's a BC thing... though come to think of it, having too may help for xmute CDs ?)

Another choice would be to have another dis(enchanter) in case I change group composition as having a disenchanter in group is always useful, specially when farming

Thoughts ?