This item is also made with normal tailoring skills and trivials at 22. Combining silks will take you to 17 and with the 3 ruined pelts Treskar asks for can also be 3 attempts at raising your tailoring. The beetle eyes also sell for 2sp+ so your throwing away even more money. My advice is to sell the eye, combine the pelts when your tailoring skill is maxed on silks (silks are also a no-fail combo) which should be easy because I located a spot where at least 8 spiders spawned between the hills south of Neriak entrance. Sorry I didnt get location but will post if I see this again.