Forum:Need help with my Zombie Deck

My main deck is a zombie deck and it seems to run pretty well for me. However, I want to know how well it would do against the current meta and if there are any changes I should make. Here's the list.

Monsters: Master Kyonshee x 1 Blackwing - Gale the Whirlwind x 1 Ryu Kokki x 2 Goblin Zombie x 1 Pyramid Turtle x 3 Dark Dust Spirit x 1 Krebons x 1 Royal Keeper x 1 Double Coston x 1 Regenerating Mummy x 2 Soul-Absorbing Bone Tower x 1 Spirit Reaper x 1 Vampire Lord x 1 Despair From The Dark x 2 Il Blud x 1

Spells: Allure of Darkness x 1 Cost Down x 1 Book of Life x 2 Swords of Revealing Light x 1 Mind Control x 1 Brain Control x 1 Call of the Mummy x 2 Heavy Storm x 1 Lightning Vortex x 1 Mystical Space Typhoon x 1

Traps: Magic Cylinder x 1 Mirror Force x 1 Scrap-Iron Scarecrow x 1 Call of the Haunted x 1 Compulsory Evacuation Device x 1 Sakuretsu Armor x 1 Negate Attack x 1 Raigeki Break x 1

Extra: Stardust Dragon x 1 Thought Ruler Archfiend x 1 X-Saber Urbellum x 1 Black Rose Dragon x 1 Ancient Fairy Dragon x 1 Colossal Fighter x 2 Gaia Knight, The Force of The Earth x 2 Psychic Lifetrancer x 3 Power Tool Dragon x 1 Ally of Justice Catastor x 1 Iron Chain Dragon x 1

I use cards that require discards, like Cost Down and Raigeki Break, because they give me a decent effect while getting zombies into the grave, making them easier to summon. I then overpower my opponent with cards like Catastor and Despair From The Dark. I believe I have built the best possible deck I could have using the cards I currently own (my 15 Synchros are the only Synchros I own that I can summon in this deck) but want to know what cards I should look into obtaining to strengthen this deck without completely changing it. I don't have a lot of money so obtaining these cards might be hard, but I still would like to know what to add. Thank you in advance.