There is a BIS and there is a dmg calculator. Stat weights we're always based on BIS but didn't make them necessarily correct at lower gear. It's not that there is no stat weight, its just the folks doing the math feel its misleading to give one out.... Crit > DH at different thresholds or vice versa.

Here is the BIS and what you should be shooting for http://ffxiv.ariyala.com/12HO7 - this set outperformed many different variation and it was all done calculating potential dmg output. Credit goes to Nemekh