Target the enemies and eliminate them one at a time. Attack the enemy that will attack you second. By doing this, you have more potential attacks for the faster enemies. However, if you notice that a monster is weak when your target is about to attack, change targets while your monster attacks. Always get the most damage out of your attacks. Always use the highest level card when attacking. The cost of a card does not increase when you level it up from fusing. Also, select the best monster for battle and keep your cost close to your maximum as possible. Create substitute teams to use against specific monster weaknesses. For example, have a fire team, a water team, a wood team, etc. ready. This allows you to quickly switch from one situation to the other without having to go through all your monsters.