Just throw it in a scenario to turn in GC loot and desynth the rest. Stone Vigil is the only one with any “junk loot” but that can all be desynthed with 0 desynth skill.
Example — Does 5 runs, repairs, desynths junk, turns in gc gear. Bam, inventory nice and empty again. Make sure to change the option in ffxiv to send new armor/weapons to the inventory instead of the armory
grid(IF-Squadron)
dungeon(Stone Vigil)
waypoint(0)
squadron(5)
repair()
desynthList(Stone Vigil)
desynth()
waypoint(1)
teleportNPC()
waypoint(5)
deliverGCGear()
waypoint(2)
teleportNPC()
waypoint(0)
repeatAll(10)