I get the feeling things are getting way to complicated ...
The logic behind armor is that: Good armor is made of a strong kind of metal, but this kind of metal is heavier too ... so that's the reason why good (metal) armor should have a strenght requirement.
But what about an intelligence requirement? People who want to concentrate on magick will probably put points in intelligence ... So maybe there could be a simple cloth tunic ... but with a special kind of spiritual armor on it. It doesn't weigh much because it's made of cloth, (so no strenght requirement) but a warrior with a head of wood will never figure out that this is a special kind of tunic so he can't wear it (an intelligence requirement).
You could even go further (but maybe not good for gameplay). In <img src="/ubbthreads/images/graemlins/div.gif" alt="" /> there were special pieces of armor with special bonusses like strenght + 2 or with a certain skill bonus. I guess just identifying such an item is not enough to use it, you need some intelligence too. So maybe only chracters with a certain intelligence can use such pieces of special (enchanted?) armor. That way a magick character can still have some benefit from investing in strenght ...
Just some ideas ...
