Looking good Monsier Valefort...looking very good!
Some questions: is there a Inscribing Gold Coin cost scale (because I can see this "habit" becoming a costly one...

) that can be publicly posted?
Also, I tried to inscribe a Rune of higher than my PC's CL, and the system auto-inscribed a Rune down to my actual CL, which is a good thing!!
Also also, dropping a Rune has the result of the Rune disappearing, which I guess makes some sense, but:
A 6th level Hierophant can learn to channel his power into runes, storing the spell for later use. He may store one spell per spell level, creating and imbuing the rune at modest expense compared to scribing a scroll of similar level.
.
So I'm assuming these Runes actually exist, as objects, and thus, should not just disappear if placed on the ground, or traded, etc. I mean, unless the magic requires that the Runes stay within a 1 meter proximity to the casting Hierophant at all times else they dissolve, it doesn't make sense that the Runes are not...concrete objects.
Mostly, it's a bummer if you accidently drop a Rune, cause that'll cost you a thousand gold coins or more. Could it just be possible to make Inscribed Runes non-tradable/droppable, to protect against this? I know, minor issue...but....
I'll keep testing it out, but otherwise, really cool this PrC is working tip top!
Cheers.