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Look into the Kineticist class. They're from Occult Adventures and are CON casters. I have a sylph aerokineticist who put a lot of points into DEX (20 total) and CON (16 total) and she wrecks house from 120 feet away.
A few archetypes, such as Overwhelming Soul and Elemental Ascetic alter the casting stat, but will basically do what you're looking for.
Best part about the class is that antimagic zones don't influence them and they can suffer mind-altering effects and still be useful, unlike psions.
Also, some of the elemental abilities like earth and ice give you ridiculous amounts of DR or AC at early levels.
Just food for thought.