Are you new to FFXIV? Cause I've seen this topic a billion times since coil, and the format hasn't changed. One piece a week, and that's it.
You have variable ways to get gear for your many jobs (that most of us already have at 70. Including me with all classes at 70 except fishing)
1) Tome grinding weekly for 390 gear (upgrades from monastery to 400)
2) Current tier level gear that's applicable to grind 360-370 ilvl (upgrades from 24man raids)
3) Crafted gear (which upgrades to 390 with tomes and items acquired from resistance fighter)
4) Current raid tier (for endgame 400 stuff)
5) Current raid non savage 380 stuff).

All that drops usually a week before the next tier of ilvl gear. So it's not really like you need to gear up classes. Gear up your main, worry about your main, and equip your secondaries as you see fit. If you're trying to go into endgame content with the class, then focus on that. Pretty simple and standard to me.