You are correct that it takes a lot of effort to fully gear a crafter/gatherer using the yellow scrips. So ill join Nyx in recommending that we skip that step. You have a few of the shared slot items. What i would do next is try to make myself a chestpiece. If you can make that, you can make a full set to update your gatherers and finish filling out your crafting set. It isnt top of the line, but its a good start. So what would you be doing with your red/yellow scrips then? Buy any materials you might need for crafting(kingcraft demimateria if you go for the next set above the one i linked for instance), and invest the extras into tier 4-6 materia. You can stockpile for future melds and/or you can sell off your extras for funding.