Forum:Extra Deck Help for Synchron Deck

Having trouble with my extra deck Any Help {{Decklist| Synchron Quasar x1 Stardust Sifr Divine x1 Majestic Star D. x1 SSD x1 Dragon Knight Draco-E x1 Stardust Warrior X1 Stardust Dragon x2 Road Warrior x1 Nitro Warrior x1 Junk Archer x1 Tg hyper l. x2 Formula x2
 * total m = 15
 * Extra Deck=

Any advice is welcome especially regarding whether I should run double formula and whether I should replace one of my lvl 12s for another monster

Thanks!