When I made the cashmere recommendation, Cashmere Fleece was running for 8k each on my server, making it significantly cheaper than other options. Remember that melds increase your chances by 5% each, so quad-melding increases your chances by 20%. At 85 skill, your chance of desynthing i90 items is 40%. Your chance of desynthing quad-melded i90 items is 60% - a significant increase.

What do you consider to be a "decent chance?" At skill 90, your chances for i90 items (three star items) is 50%. At 100 skill, your chance is only 70%. So if you're looking for a 75%+ chance on those, you are out of luck. The +20% chance from quad-melding is really nice, but even that doesn't get your chances that high.