Archers, while weak individually, become deadly when grouped. Knights pack a punch, and hero knights can surprise even the toughest dragon with their wallop. On top of all this, wizard towers act as arcane sentinel artillery, and other dragons are always eager to pick on a weak wyrm.
While upgrading Speed and Fire Breath are sexy, improving your Armor can be critical to achieving good scores, and especially in multiplayer play. Every time you are wounded and sent back to your hoard, you lose your score multiplier. That is your lifeblood to big treasure.
If you find yourself constantly getting injured, then you probably need tougher scales! Put a few upgrades into ARMOR and your tactical options will increase greatly. Knights will stop being able to do one-hit kills, archers will seem less irritating, and even upgraded wizard towers won’t be quite as deadly. A fully-upgraded armored dragon is a sight to behold, with horns and armored wings and tail.
Having extra hit points in multiplayer can also mean the difference if your opponents like to fight. Store up a MEGA-BREATH powerup and let your armor soak the damage while you toast them and send them packing…and scoop up their gold, naturally.