I really do hope you mean ATK-crafting, right?
Unfortunately any trader profession but Structure trader is kind of borked, mentioned early on in the Beginner's Guide for Traders. That is a sad fact. While I advice that new crafters learn their profession ground up and stay away from brain-dead speed-leveling I also understand the frustration from so little XP and one needs the billions, slightly exaggerated.
May I suggest the following
Install SWGAide and at the Schematics pages you filter for Munitions, and your current level. Scan through the schematics you can craft and for all those that read
UNKNOWN for XP or whatever, obtain that info and post a list of what you find here at SWGCraft. Remember, no XP bonus while you do this, none whatsoever.
This will at least give you something to do for some days
Once you are done ... respec to Structure Traders and craft fountains until level 86, then Gungan Heads. That will take about 2 hours. The time you save from respecing you spend on helping the munition-crafting community
First respec is free, respecing back costs a few credits, but it decays one notch a month.
Good luck
Zimoon