those "sit back and wait for your crew to bring you a box of money" gathering skills were never truly meant to be peoples main form of profit cause theres no real effort involved, hense all the nerfs lately. However, production skills are highly profitable if you actually take the time and effort to produce blue/purple schematics. There are plenty of people out there willing to pay large amounts of money for upgraded gear. Consumables are always the best money maker in every mmo i've ever played, so Biochem would be your best bet, logically. But remember, this is a brand new game, there arent that many people out there yet with maxed craft skills and blue/purple schematics for every single recipe, so really any production craft skill would be good. Just pick something that interests you, or that would produce gear your class could use.