Alright, so this is what I'm working with right now. It's far from perfect, so don't judge me too harshly. It's fun, and effective, but could be better.

Main-

• 3 Kozmo Tincan

• 1 Kozmo Strawman

• 1 Kozmoll Wickedwitch

• 1 Kozmoll Dark Lady

• 2 Kozmo Skiprider

• 1 Kozmo Forerunner

• 1 Kozmo Dark Destroyer

• 1 Kozmo Dark Eclipser

• 3 Card of Demise

• 3 Into the Void

• 3 Pot of Duality

• 2 Terraforming

• 2 Kozmotown

• 1 Mystical Space Typhoon

• 1 Dark Hole

• 1 Raigeki

• 1 Soul Charge

• 3 Call of the Haunted

• 1 Back to the Front

• 2 Kozmojo

• 1 Quaking Mirror Force

• 1 Storming Mirror Force

• 1 Breakthrough Skill

• 2 Dimensional Barrier

• 1 Torrential Tribute

Side-

• 2 Divine Dragon Lord Felgrand

• 2 Arkbrave Dragon

• 1 Dragon Spirit of White

• 1 Amorphage Goliath

• 2 Thunder King Rai-Oh

• 2 Dragon Ravine

• 1 Return of the Dragon Lords

• 1 Dragon Shrine

• 2 Solemn Stike

• 1 Solemn Warning

Extra-

• 1 Cyber End Dragon

• 1 Barbaroid, the Ultimate Battle Machine

• 1 Number 39: Utopia

• 1 Number S39: Utopia Prime

• 1 Number S39: Utopia the Lightning

• 1 Shark Fortress

• 1 Cyber Dragon Nova

• 1 Cyber Dragon Infinity

• 1 Red-Eyes Flare Metal Dragon

• 1 Divine Dragon Knight Felgrand

• 1 Hieratic Sun Dragon Overlord of Heliopolis

• 1 Number 38: Hope Harbinger Dragon Titanic Galaxy

• 1 Galexy-Eyes Cipher Dragon

• 1 Number 107: Galaxy-Eyes Tachyon Dragon

• 1 Number 95: Galaxy-Eyes Dark Matter Dragon

Games 2/3 you can Side out the Kozmo stuff, and Side in the Felgrand. If you're ever going up against something that's unaffected by Dimensional Barrier you can Side those out, and Side the Solemn Strikes in while keeping to the Kozmo strategy. Against everything else you go into your Felgrand stuff, and punish your opponent for Siding in System Down.