Which dragon should you raise first in Game of Thrones: Dragonfire?

Prioritise the Legendaries you actually field: they have the best habits but they eat the gold Cores, the rarest material, so concentrating them matters.

A sensible order:

1. Syrax (Legendary Sentinel) — switches on the fire of the whole line plus First-Strike. Strong from the early game.
2. Caraxes (Legendary Hunter) — massive fire burst, and it scales off Syrax's First-Strike.
3. Crimson (Legendary Hunter) — stun plus top-tier raw power.
4. Seasmoke (Legendary Champion) — strips enemy buffs, superb aura at the Center.

Don't spread your gold Cores across the roster. For level (which resets), push it on the 3 dragons in your current army. For the permanent side — stars and habits — concentrate on 3 or 4 key Legendaries.