Well, depends. You want to focus on tradeskill components to sell in the baz or just stuff that sells to vendors well?
Eh, just stuff that sells quickly. My alts are nearing 80 and need plat for spells and gear. However if said components sell well, I am up for it.
Right now I'd just check what sells well from Darkened LGuk and Reinforced Blackburrow. Could do alright there while getting okay XP.