I had zero luck doing it with the jewelry method, zero for 16, but i do Just fine on own forge using Slim's method with the bows. I modified it a bit to make it much cheaper, my method uses NO EE, only MR and only saphire,ruby, and amber, the cheapest gems, figuring in fail/losses cost runs on avg about 27000gps per relic(not counting wood cost)
I make ex bow with over 55 durability,
add 46% mana leech(4MR,8 sapphire, no failures)
add 46% life leech(4MR, 8 Ruby, 80.8 chance)
add 44% fire area(4MR, 8 Ruby, 42.8% chance)
add40% hit dispel(4 MR, 8 amber, 17.4% chance)
enhance with yew wood and unravel
avg cost figuring in normal failures in the neighborhood of 8 sapphires,24 rubies, 56 ambers, and 44 MR