Note that in the case of Eldritch Heritage, you wouldn't need more than one feat to get Claws. Just the first would be fine for that.
Of course, if Cha is your dumpstat, that does make it less practical.
That'd seem to leave your options as either enchanting them like a weapon, or hoping Dr Simon approves your PrC.
Hm. You might also page through the Magic Item Compendium. I recall there being some magic items that empowered natural attacks in there. Well, one in particular. An amulet meant for druids that was part of a set. It explicitly works even when melded in wildshape and gives an ongoing +1d6 electric damage to all natural attacks. It's not impossible that such an item, or one like it, could be approved for use in this game.
Of course, if Cha is your dumpstat, that does make it less practical.
That'd seem to leave your options as either enchanting them like a weapon, or hoping Dr Simon approves your PrC.
Hm. You might also page through the Magic Item Compendium. I recall there being some magic items that empowered natural attacks in there. Well, one in particular. An amulet meant for druids that was part of a set. It explicitly works even when melded in wildshape and gives an ongoing +1d6 electric damage to all natural attacks. It's not impossible that such an item, or one like it, could be approved for use in this game.