Mare, don't bother. Every thread I've seen so far, on the subject, has this fellow posting that he has a golden goose in the corner dropping blue and purple schems left and right.
Spending hours gathering mats only to have nothing, at all, to show for the invested time and effort is a bad experience. If there was a set figure such as: 20 times mat cost for blue and 40 times mat cost for purple, to have a guaranteed result, that would make the system semi-bareable. I RE'd a green item over 90 times to finally get a blue schem and this was for a low/mid level armor piece; I was almost to the point of pulling my hair out.