As far as I can tell, mithril is only useful to the Luchuirp in two ways: firstly, it gives certain units mithril weapons (which is practically useless given that no golems can wield weapons), and secondly it allows the Mithril Golem (a great unit, but only if you can get the AC over 70). In other words, the Luchuirp seem to benefit from mithril less than any other civ I can think of, which seems to me a rather strange circumstance for a civilization based on craftsmanship. Am I missing something, or was this done simply for balance reasons?