Richuss here, Nas was nice enough to fix rune axes (mp drain, hp gain latents). This was completed in the last maintenance. I'm assuming he fixed the other rune weapons as well, which are obtainable with an infinity core (ah or dynamis) and a colored chip for mini quest.
They work as originally intended with gaudy harness, I'm assuming the effects with two of them will now stack. Useful for /thf or /nin when farming as some pieces have mp on them
Anyway, Kudos to Nasomi for listening to my constant complaining lol.