Hiya!

Mostly Fiend deck ideas here looking for thoughts on card swaps and removals. Please also provide you thoughts on side deck and extra deck possibilities. :-)

Mostly Fiend Decks Ritual.th

Ritual: Mostly a odd special summon and ritual summon deck. I don't know what the heck I'm doing with it, and it could probably use allot of work.

Monsters: 22
1x Djinn Cursenchanter of Rituals
1x Djinn Disserere of Rituals
2x Djinn Presider of Rituals
2x Djinn Releaser of Rituals
3x Manju of the Ten Thousand
3x Giant Germ
1x Marshmallen
1x Darklord Zerato
1x Light and Darkness Dragon
1x Chaos Sorcerer
1x Dark Nephthys
1x Possessed Dark Soul
1x Gorz
1x Sky Scourge Invicil
1x Sky Scourge Norleras
1x Dark Necrofear

Ritual Monsters: 2
1x Demise, King of Armageddon
1x Ruin, Queen of Oblivion

Spells: 13
2x End of the World
1x Swords of Revealing Light
1x Giant Trunade
1x Cold Wave
1x Heavy Storm
1x Smashing Ground
1x Mystical Space Typhoon
1x Brain Control
1x Nobleman of Extermination
1x Bait Doll
1x Lightning Vortex
1x Fissure

Traps: 3
1x Solemn
1x Mirror Force
1x Torrential Tribute

Mostly Fiend Decks Darkworld.th

Dark World Deck: Seems to be okay at the moment but i can often get bad draws or lose card advantage somehow.

Monsters: 24
3x Goldd
3x Sillva
3x Rigorous Reaver
2x Fiend Roar Deity Raven
1x Dark Necrofear
3x Beiige
3x Broww
1x Sangan
1x Gorz
1x Morphing Jar
1x Dark Nephthys
1x The Dark Creator

Spells: 12
1x Cold Wave
1x Heavy Storm
1x Giant Trunade
1x Mystical Space Typhoon
3x Dark World Lightning
1x Mind Control
1x Brain Control
1x Card Destruction
1x Smashing Ground
1x Swords of Revealing Light

Traps: 4
1x Call of the Haunted
1x Torrential Tribute
1x Mirror Force
1x Magic Cylinder