You can do the Chocobo race at Remiem Temple in the COlm LAnds and open 3 treasure chest without hitting a pole and manage to win the race to get 30 wings to discovery. If this is your first time doing this then you will have to repeat the race again to win them. Another way that is a little expensive is to bribe a Malboro for 540,000 gil for 4 wings to discovory or if you have t a load of money you can bribe a Great Malboro for 1,280,000 for 8 of them. Another way that is long and hard is to fight Nemsis you get break weapons/armors. If you want a strat on how to fight Nemisis just let me know and I'll give it to you.