I need to vent and put my thoughts elsewhere. I want to make a character whose s@$% is to "burn it all down!" I would appreciate help picking a class. While I may not use him, I want to fallow PFS restrictions. Thank you in advance.
Pyrokineticist.
next you'd be looking at sorcerer or specific oracles to get lots of fire spells. Then would be your wizard and specific clerics. Then arcanist. After that you're not getting enough fire or strong enough fire to be worth considering.
There are quite a few. Actually have to build a tree and will restrict myself mostly to feats and favored class bonuses (FCB):
Torches
* Goblin: Fire Hand + Burn! Burn! Burn!
* Worship Asmodeus: Firebrand
Unarmed
* Monk: Elemental Fist, Efreeti Style etc.
Weapon fire damage in general
* Ifrit: Elemental Strike, alternatively (doesn't stack?) Scorching Weapons + Inner Flame
* Channel energy ability: Energy Channel feat
* Hunter with Planar Focus (fire): 1d6 to 5d6 fire damage per hit with any weapon
* Weapon Evoker Mastery (increase built-in bonus damage of a magical weapon)
Spell damage
* Bard: Fire Music (deal fire damage with bardic performance)
* Half-orc: FCB for magus + sorcerer
* Kobold: FCB for sorcerer
* Energy Mastery (abuse certain item to cast Burning Hands)
Metamagic
* Flaring Spell (dazzles)
* Burning Spell (well, ignites target) / Burning Amplification (technically not metamagic, but similar effect)
Supernatural damage
* Half-orc: FCB for kineticist
* Ignite after sundering: Relic Breaker
Special effects of fire
* Half-orc / orc: Fire God's Blessing (heal by dealing fire damage)
* Worship Sarenrae: Glorious Heat (heal allies by casting fire spells)
* Kineticist: Kinetic Counter (neutralize a white dragon's breath etc.)
* Channel energy: Blazing Channel (ignites undead)
* Arson subdomain: Call fire (well, call it to you, burning foes on the way)