Looking for ideas for a magma themed character

I'm looking for build ideas for a magma themed character. Black stony exterior with fiery insides.

My first thought goes to an earth/fire kineticist. I already have a straight earth/earth kineticist with no archetype, so I would prefer to do something a little different at least...like maybe go with a kinetic knight or elemental ascetic archetype if I do go kineticist.

If anyone has any solid kinetic knight or elemental ascetic builds, I'd love to see them. I'm kind of leaning towards making the character an Ifrit for thematic reasons, but I'm open to other ideas. PFS legal builds are my baseline, 20pt buy, only Paizo approved materials.

Are there any other classes/archetypes that might fit the concept of a character who harnesses the power of magma?

Oracle with volcano mystery would do a decent job. Ifrit works for oracle.

Interesting, my knowledge of the oracle class is quite lacking. I'll have to look into them a bit more.

A kinetic knight is a very straightforward character to make. The main decision is weapon finesse or not - which is probably yes, take weapon finesse for an ifrit. Just don't dump Str so hard you can't carry your armour & shield.

Wizards with an elemental school of earth or fire can take magma as a variation on one of those. Sticking with the theme is mainly up to the player though, aside from the bonus spell slot there's not a lot of encouragement to do so.

Blackened or Elemental Imbalance Oracle with spirit guide and choose a spirit or mystery which gives you stoneskin. Thinking about how to build this exact thing.