What are the Champion, Warrior, Hunter and Sentinel breeds for?

Every dragon belongs to one of 4 breeds, which sets its role and its damage type:

• Champion — the Suppressor, with mixed damage. Versatile, and usually your best Center for its aura.
• Warrior — the Enhancer, key stat Strength, physical damage. The heavy hitters (Vhagar, Daemoros, Thunderstrike).
• Hunter — the Debuffer, key stat Intelligence, fire damage. They soften the enemy up (Crimson, Caraxes, Jagadrix).
• Sentinel — the Buffer, key stat Instinct, tactical damage. They boost and heal your allies (Syrax, Malachite, Zivern).

A good army mixes the roles: a Debuffer to break the enemy's defence, a Buffer to inflate yours, an Enhancer for the burst.