Yu-Gi-Oh! The Sacred Cards Tips

Really good deck
3x Jirai Gumo
3x Zombyra the Dark
3x Flash Assailant
3x Panther Warrior
3x Revival Jam
3x King of Yamimakai
1x Obelisk the Tormentor (or FGD if you don't have obelisk yet)
1x Perfectly Ultimate Great Moth

3x Torrential Tribute
3x Widespread Ruin
3x Acid Trap Hole
3x Beckon to Darkness
1x Monster Reborn
1x Change of Heart
1x Brain Control
1x Pot of Greed
1x Raigeki
1x Harpie's Feather Duster
2x Megamorph

Honestly, I beat marik (the real one) with 900 attk point monsters (one 1850 and one 1600) as 4 star or lower summons, 2000 attk 6 star summons, and obelisk, with the magic and trap cards listed (cept I never got to use megamorph), however it was difficult and I lost the first time by a bad draw. If you definitely want to win, your monsters should be above power against his, so this would be the best deck.