Help with aethercell gloves

[Jojoya]

But HW was forever ago so idk if a GC rank is needed

It is. You still need the GC rank to unlock the Hunt before the subsequent expansion Hunts can be unlocked. A higher level character can get 2nd Lt. in a couple of hours. OP may already have a lot of the seals needed if they've been doing leveling roulettes. Once Sgt. Second Class is obtained, it's smooth sailing since the OP would have access to Expert Deliveries for getting the rest of the seals needed.