I know that this isn't much different than the Structure Deck, so that is why I am accepting any suggestions to improving this deck, apart from the cards suggested in the structure deck itself.

***When I made a Gemini focused deck, I took out a lot of the Warrior support (ie: Spell Striker, Freed, Field-Commander Rahz, Reinforcement of the Army, Divine Sword, etc), but I added in more ways to get Gemini Monsters in the Graveyard for easy retrieval. Add in a couple Future Fusions instead of using Polymerization. It will not deplete your hand that way, AND you can choose which 2 Gemini Monsters you want in your Graveyard to retrieve later instead of having to use what your hand limits you too. It also eliminates the need for Card Trooper, which makes room for Woodland Archer (since Future Fusion would put 2 Geminis in your Graveyard anyway). I would also look at buying another couple structure decks to get another Evacatur Chevalier, Supervise, and Double Summon. Also, add in a Tuned Magician to get some Synchro work going. Don't forget Black Bulldrago. Finally, I would throw in 2 curveballs. Look at Magical Reflect Slime...if you equip that with Supervise and attack your opponent's monster, THEY take the battle damage, and while your monster is destroyed, the special summon effect of Supervise activates. Also, try running Kuraz the Light Monarch. He can be used to destroy troublesome cards your opponent has, or some cards that would benefit you, like Supervise equipped to a different monster, a Big Bang Shot equipped to your opponents monster, or a Gemini Booster.