Can craft q3 Resplendent Illimited Diamond (without inspiration proc) using q3 mats. Difficulty is 375, max JC skill on it is 361, so it requires an illustrious insight (+30 skill, 50 mettle) be used by the crafter. So, there’s a limited number (~2) that can be produced in a week. Send a personal order (Kettlecap-Dentarg) for at least 20k. Add a note saying you don’t want the order completed if I’m out of “mettle”. If you’d rather just depend on an inspiration proc, it’s a 21% chance using q1+ mats, your choice of commission on that one.
Also, can make q4 profession (q5 proc) gear – inscription accessories, enchanting accessory, jewelcrafting accessory.
q3 frost (secondary plus vers) gems using q3 mats (although these are already fairly cheaply found on AH).