Monster Monpiece AI is stupid but having a badly build deck can make the game harder than it should. If you don’t want to read the entire guide there is a TL:DR section which should give you an idea how the deck runs. For the rest, detail information on the deck and how I open. In most cases using this deck will get S or SS victory.

The deck is two colors; red and yellow. Made up of Dragons, Demi-H, and Fairy. Highest casting cost is 5. That’s it.

Dragons
6 Basilisk
6 Fafnir
6 Ladon

Demi-H
5 Goblins
3 Minotaur
2 Lizard Man

Fairy
3 Fairy
6 Pixie
2 Koropokkuru

Total 40

27 Melee
13 Healer

8 2 mana casting cost
20 3 mana casting cost
8 4 mana casting cost
4 5 mana casting cost

Advance Attack Scroll
LGD Attack Scroll
LGD shock Scroll

If you want SS victory all the time I suggest using these direct damage spells to help you push through the enemy blockade at the end. Otherwise most of the time you will get S victory with the deck.

I picked two color instead of mono because I find fusion more useful than aura. Aura is very useful hence the two color but not as big as having the same species. Having mono color means more species and less of a chance to fusion.

You can build a single species deck like all dragons but the mana cost will be high. The mana bonus, attack, and toughest you get from aura will be lost. It will be almost impossible to get consecutive chained colors in a single species deck.

I use melee because the toughness it brings. Having 10+ toughness (fusion + aura) with a healer behind the melee fighter is almost impossible to kill. It can’t get one shot in enemy territory. The computer will try desperately to stop thus giving you time to build the other lanes. In the end the computer will waste all it resources trying to stop the unstoppable.

If you don’t have the right combination just skip the turn and you should be good enough.

Have a healer and two identical specie of the same color in your hand. For example: Two Yellow Pixie healer and Yellow Fafnir. Or one yellow Pixe and two yellow Fafnir. If you don’t have the combination you can skip your turn and hope for the best. Keep in mind you get +1 mana if you place 2 consecutive same color. 3 mana for 3 consecutive same color.

Your starting move is place the healer in the middle of lanes. Next turn place a melee in front of your healer. The melee will be the same color as your healer. On your third turn fusion the melee or healer. The melee or healer should be the same color to get the max aura bonus. It best to fusion the melee fighter to prevented one shot when it enter the enemy territory. The fusion melee fighter with healer backing up will keep the computer busy for a while. It will allow you to focus on the other lanes. Make sure to keep track of the healer MP. Fusion the healer if the MP are low.