Synthweaving until you are able to craft your Rakata pieces (you can technically take time to do this with Artifice for Rakata Relics, Cyber for Earpiece, Armor for Implants so you have all of those), then ditch Synthweaving (or one of the aforementioned others) for Biochem.

Or do what I do, since my Jugg tank is just a casual "for fun" toon for me:

Took Slicing, Scavenging, Investigation to farm mats for sale on the GTN/to feed my crafters.