Forge golem's searing arc isn't actually hitting its primary target, so it can't be mirror stance'd. Not sure if it also applies to the player version, since I can't learn it.
It seems to have the same tags as the suula penis, which doesn't seem right. And that one rahn on breedwell was like 'your vagina that's supposed to be full of aphrodisiacs and tentacles is completely normal and boring' which is kinda weird.