I don't mean to burst anyone's bubble, but I don't think that you can assign an EC value based strictly upon an item's rarity or stats. You have to factor in both if you want the game to maintain balance. Even though it's somewhat difficult, I feel that's how it must be done, even if there is a gray area. Plus, if you need any help, I will be more than willing to lend a hand.
Also, my name isn't Björn, but yeah, you should base a lot items off of Björn's site. Although there exist several items that are not listed on the site that should maybe be added to the list. Again if you need help with those items, I do know some of them.
Awesome idea to whoever came up with it
