The Avatar of Flame is found in Lavastorm towards the back of the zone. To reach him quickly it is best that all raiders have the cog teleportation pad activated. Going through this teleport you can run along the path way down the dragon tunnel where you will see him near a spire required for a Heritage Quest.

Dealing with Solusek Ro it is essential to have a 70% resistance to fire and ice elements. Having even higher would be better and it is wise to take along a fury and warden with master I elemental ward spells. The Avatar of Flame is considered one of the weaker avatar fights and the starting point for avatar raiding next to the Avatar of Valor.