Just a funny anecdote.. I did my belt & right side recently and the 6% melds (craftsman IV on the last slot) gave me way less trouble than the 10-11% melds (4th slot). I spent on average 18-20 cunning IV for 4th slot melds (the worst was 37). Whereas the 5th slots took me 5-10 usually. Coincidence? Most likely. But this has been my experience throughout the patches.
