Circle of Wildfire.
The fire druid. This is a really cool subclass that does tons of fire damage, which can be a setback due to all the fire resistant monsters, but it also gives you a fire pet. Along with the normal Druid class features this one gets a ton of fire spells with their circle spells, Summon Wildfire Spirit at lvl 2, Enhanced Bond at lvl 6, Cauterizing Flames at lvl 10, and Blazing Revival at lvl 14.
We have one of these in our group and she deals tons of damage and the Wildfire Spirit is awesome.