pretty simple really, each tier goes up 20ee or 5 stats or 1/1.5/2 for things like magic luck/quick draw/regen
http://forums.d2jsp.org/topic.php?t=64994369&f=276should answer your question, more specifically this picture
http://i634.photobucket.com/albums/uu64/Stok3d-Photos/IG.jpg