Point. That was the re-type after losing the better but longer post. Basically he wants to charge the "heart" for use as a bonus against the priest or the Archon later. Hence, my request of not letting it turn to munchkinism. Perhaps a temporary nullification of priestly abilities.
Sorry, completely forgot to reply to this. In short, these guys are pretty much a bunch of nobodies in the grand scheme of things. At best you'll get a couple difficult checks to create a fairly weak one-time item (on the tune of +1 to a save against Mitran magic).
Priests, Paladins, Angels and other powerful beings are much more useful in this manner, though they'll already give Reputation rewards (and in the case of angels/supernatural beings, crafting materials), though they're also a good place/way to invoke some divinely fuelled Narrative Control...
So, we ready to move on? Anyone got some business in town or should we move out? And what is the gameplan for the assault?