At beginning, Let's only use up to two Aura

• You can not efficiently get aura bonus if you use three or more aura. If you can get aura bonus non stop for three rotation, you get 12 extra mana.

• Yellow aura is recommended for early stages. Many of Yellow cards are normal, and they are easy to use.

Mana cost management

• This game do not have bad luck compensation system; if you have only high cost card in your first hand, it is possible to lose without able to do anything.

• 6 mana monster girl's power level is not that different from a monster girl who is a two 3 mana monster girl fusion. It is important to keep dominate battle field, it is better to keep putting unit into battle field.

• when put together 40 card deck, try to have 20 low cost card (1-3 mana), 15 mid cost card (4-6 mana), and 5 high cost card (>=7 mana).

On Race

• Same race can fusion together.
  If all cards are in one race, it is easy to fusion.

• One monster girl can become 3 different card; you can have 9 copy of same monster girl. This way, you can perform fusion easily.

• Put 9 early stage 3 mana high hp melee card in your deck. You can fight well in middle stage when enemy become stronger.

Melee, Range, Healer balance

• Melee cards are most important due to high hp and attack.

• Healer cards are important because they back up melee cards in long battle.

• range cards can hit high hp target from far; or they can help melee attack enemy.

• At start, put 20 melee, 10 healer, and 10 range in your deck.

Get rid of buffer

• Buffer can buff melee which sounds good; but consider range can effectively do the same thing; range who can function by itself is better.

• Buffer can still be useful; but they are not really needed for early stage or quick battle.

• After rub, Fia become powerful stationary range at back line. Remember she do not move forward.

Last word.

• What is written here is only one possible strategy; experiment with different deck build as you play.

Have 3 Nekomata +1 (final form card No. 378) in your deck.

• Mana up is good for all deck.

Balance between skill card and non skill card

• Skill is powerful but depend on situation a lot. If skill is not useful in current situation, it just add cost. Do not just have skill card in your deck, you need some lower stat non skill card.

• Non skill card is mainly for fusion, and get mana from recall.

Add counter attack

• If your card power is close to your enemy, it is hard to deal damage without healer and counter attack melee combo team.

• If you go first, it is possible to win when you have a deck out (can not play any card first turn due to all card cost high mana). But if you go second, healer and counter attack melee combo team is a must.

Have Format type skill

• If you have no mean to fight fusion-ed counter attack card, it is over. If you have cards that have format type skill, you can deal with various deck. I recommand Card No.24 Blue Dragon +1 swimsuit form.

• Those cards use many mana; things happened when you have too many of them. Make sure your have enough mana up cards.

Add Buffer

• As you have more high range easy to use range card, buffer become more valuable. If your melee can effectively attack 3 times, you get your money worth.

• Too much buffer cards tend to become waste, 5 is about right.

I am too lazy to translate this part.