Send in your warrior Dragon in first when attacking a heavily fortified city, as they are a more durable type of dragons than hunter and sorcerer ones, so they can withstand heavy fire and thin out enemy ranks.
Sorcerer dragons have a wide area of impact, meaning that they can damage multiple buildings at the same time, so they should be your prime choice when attacking a cluster of defense towers.
You can become a member of a guild, and members of the guild help each other in both attacks and defenses.
Use Evasion spell on your hunter dragon to make him fly over an island quickly and target the next one.
The fewer dragons you use to complete a mission, the higher the amount of earned wood, experience, and food you'll earn.
Red mage towers block and disables red spells, while the blue mage towers do the same for blue spells.
Cannon towers break through any shield, even invincibility isn't invincible when you have them.
Lightning towers amplify each other's power, so aim to group them together.