What if you could combine like types, IE +2 mining and another +2 mining to create a random +4 mining, BUT! anything that totals over +5 has a chance to destroy the original 2 items leaving you with nothing. At +6 there would be a 10% chance of destruction, +7 25%, +8 50%, +9 70%, and +10 90%. You'd be able to negate this destruction by 5% intervals per 1 million gold you put into it. Or 5% per 10 ED. This would give people skills they need while still making the high end items obtainable but rare. It would also provide an economical counter balance to inflation. Just an idea. I also like the idea of lesser/regular/greater magical clothing deeds. That way you could effectively sell them better.