You can also use Red Scrip to get Gathering, Perception, and GP tier 4 materia. If you merely go with the scrip gear, the materia won't mean much to you. If you go for the best gear possible, you'll blow up quite a few of those T4 materia overmelding the i190/i195 gear. And then blow up a bunch more come SB when you hit 70 and again seek the best melded gear.