I've completed FFVIII twice and believe me, you won't be using them at the end AT ALL! Once you have the ragnarok (airship)on disc 3, go to the island closest to heaven and the island closest to hell. If you have Odin, keep running from battles and he'll eventually appear and completely wipe out your enemies giving you a load of Exp. Run away more often and he'll appear more often. There's also a load of draw points there so good luck finding them!