After scrambling around for a while, trying to find something I could use in the same vein as the 3.5 Warlock, I've looked upon the Wilder. Now at first glance, the Wilder is really nothing like the Warlock, but the Blaster Wilder archetype got me thinking. From what I can see, you can essentially Wild Surge with your Surge Blast to have it deal 2d6 of damage per +1 your Wild Surge gives. You get Modified Blast feat at level 2 to allow you to augment your blast in various minor ways. The Elemental Blast feat allows you to make it a different element, meaning the fire and cold blasts deal +1 damage per die rolled.
My question is this. What other ways can you make the Surge Blast deal more damage? Point Blank Shot should work. I dont think the Blast counts as a power, otherwise I would take the Favored Energy feat to add an additional +1 damage per die. My idea was to use the Surge Blast to act sort of like the Warlock's Eldritch blast, and use the powers sort of like the Warlock's Invocations. Sure, they may not be unlimited, and they can't be Surge augmented, but they could be used when a single Surge Blast won't cut it.
Oh trust me, I have looked over both of those options. The Kineticist fits very well, but theres just...something about it that doesn't sit quite right with me. Though I may try an Elemental Annihilator one day and just use the suggestions that Mark mentioned for a fire based Annihilator. SoP could also work very well, but from what I remember (Id need to check my pdf again), the Destruction Sphere doesnt have quite the number of ways to modify the destruction blast as I'd like.
Basically, I'm just really looking at all the different options I have available via Paizo and 3pp products to see what I can build. Thank you, however, for the suggestions! Also, the Blaster archetype is listed on the d20pfsrd.com site.