Quote Originally Posted by Nezerius View Post
If you're seeing fails, then you're not WAYYYY above the stat requirement to remove any fails. Quicksynthing success is based on gear, possibly just craftsmanship. Get enough of that, and you'll stop seeing fails.
Pretty sure it is item level based. There was no noticeable difference in quick synth failure rate by going from 1150 to 1650 craftsmanship. Though only 100 quick synths were tested for each value so I can't really say for certain.