Sami is right.
Regarding "MBI" page on wikia. It was me who wrote it. It was rainy friday and i conujured it from speculations [whole material group thing is major speculation] and some unverified data [guidebook/houeland] in about two hours.
After that article suffered porting to table form [which IMO sucks]. It had some major problems which I fixed later. Well, bracer thing [and some other known mistakes in it] has been on to do list for a half year.
Probably it gets done one day. Knowing how far away from being sober i was writing it i'd say it still works pretty well.
So far rolled 15 casters with RoDS and shamelessly killed them within 200 turns. For eternium glory!
(after 15 I stopped counting...)