How can i make this deck better and smaller?

ps my deck is like a spellcaster deck.... (MONSTERS)- beastking of the swamps, blast magician, breaker the magical warrior, burden of the mighty, buster blader(2x), crystal seer, cure mermaid, cyber dragon, dark magician(2x), dark magician knight, defender, the magical knight, des koala, double coston, endymion,the master magician, frequency magician, gemini elf, guardian angel joan, junk synchron(2x), magical exemplar, magna dragon, nitro synchron, rapid-fire magician, royal magical library, skilled dark magician, skilled white magician, summoner monk, the dark-hex sealed fusion, the trojan horse, magician's valkyria, (SPELLS)- burden of the mighty, cost down, dark magic attack, final countdown, flash of the forbidden spell, giant trunade, mage power, magical citadel of endymion, mausoleum of the emperor, polymerization, riryoku, scapegoat, swords of revealing light, the shallow grave, knight's title, (TRAPS)- a hero emerges, call of the haunted, defense draw, magician's circle, miracle restoring, pitch-black power stone(2x), solemn wishes, straight flush, mirror force. (EX)- armory arm, black rose dragon, colossal fighter, dark paladin(2x), exploder dragonwing, goyo guardian, junk warrior, nitro warrior, red dragon archfiend, stardust dragon(2x) tempest magician, arcanite magician. and i have all cards so just tell me how to fix it