I have an urge to design a spear-fighting PFS character who picks up this feat and uses rune-carved stone shortspears.
I'm looking for any build ideas from the collective Pathfinder brain trust... the build would need to be useful at all levels 1-12. The splintering can just be a secondary ability to use to set up some bleed damage while closing, not the character's primary means of damage but one that will get enough use to justify the feat being in the build.
I know this is a far from optimal start (mandatory mediocre feat relying on fragile weapons, plus using throwing weapons which tend to be suboptimal builds to begin with). However, I'm open to any and all class combo build suggestions... any are appreciated.