Forwards

Relm (4-144H) will always draw you a card, and that is about the only thing to expect from her. If you play her early, you can sometimes sneak in a point of damage. Otherwise, she will play defense for you. Gau (4-123H) helps fill your board up with Monsters and can help recur some of your best ones. You likely never want to use his Rage ability. If you have multiple copies of Gau in hand, position yourself to cast both. You want that enter-the-field trigger. Terra (4-146L) joins the cast to function as a fourth copy of Valefor (1-062L). She is often responsible for several Valefor casts in a game, as you can recur her enter-the-field ability multiple times if you return her to hand with Valefor.

Monsters

Green Dragon (4-124C), Koboldroid Yin (4-057R), and Bangaa Thief (4-088C) are three-of cards that round out 2CP Monsters. These play nice with Gau, or provide Earth CP for one specific backup we will cover later. I chose two copies of Deathgaze (5-063H) and one copy of Malboro (4-142R) to get to 12 Monster cards, but these slots can vary. You want Monsters who become Forwards, and statistically, you will want 12 to be consistent.

Summons

A majority of these cards help slow the game down while you recruit your Monsters. Famfrit, the Darkening Cloud (3-123R) is almost always one-sided. Chaos, Walker of the Wheel (3-071H) has its oft-partnered backup in Yuna (1-176H) to be hyper efficient. Atomos (4-037C) may look odd, but it is a great EX Burst, and helps us with Earth CP. Two copies of Moogle (1-172C) help us find answers, and two copies of Alexander (4-052C) help us draw or answer a mirror-match.

Note that every Summon mentioned is packing an EX Burst, with the exception of Valefor. Sometimes, this deck will make you feel like a very lucky player.

Backups

Shantotto (1-107L) is a no-doubt game-changer for this list, and a mandatory three-of. Many of the aforementioned Earth cards are here just to enable her play, such as the one copy of Mustadio (1-118R). Nono (4-066R) is the easy-mode backup in this deck. Once you resolve him, your Monster activations are functionally free, as they will each activate a backup after attacking. Yuna is an additional EX Burst, and enables Chaos, Walker of the Wheel to be the best version of itself. Eiko helps us recur Valefor and often seal the win. Miounne (5-067R) is a card that allows us to resolve Shantotto twice, which makes it very hard for us to lose. One copy of Cosmos (1-183H) helps address our three-color concerns.