It'd take quite a few feats to pull off, mind.  It'd work by picking up meldshaping to get the Strongheart Vest, which reduces ability damage by one point, plus one for every point of essentia invested, picking up the Incarnate essentia capacity boost, and getting my hands on three essentia, investing it all in the vest.  The ability damage from spontaneous persisting goes from 6 to 2.  I then grab the Metaphysical Spellshaper capstone, which reduces the metamagic mod of all metamagic by one (minimum one), lowering the damage to 1.  After that, I'd either need a source for a +4 Con boost, so I could use Expand Soulmeld Capacity to invest one more point of essentia in the vest, or I could go to Easy Metamagic: Persist Spell (a Dragon Magazine feat) to further reduce the price of Persist Spell, down to +4, which the vest could handle completely.<br/><br/>Totally broken, mind, but a very cool theory.  Then I could follow it up with Transmitting Orgasm to cast persistent, extended, sixth-level buffs on people. :P