Please look at wondrous tail rewards.

[Alisi]

They are only best because of the materia slots. If you had the gil, you could pentameld them. I can reach the caps to craft NQ 2 star by not even doing that. And honestly, you're looking at about the same chance of getting a diadem weapon to drop than getting both three lines and the piece you want.

All that is irrelevant. It's still BiS. I crafted the 320 set while wearing most the starter set. The fact that I could do that doesn't mean the 320 set isn't BiS. You can heal a dungeon in the top gear and in the starter 70 gear. It doesn't mean they're the same damn gear. I crafted both my sets before the 5 slot gear were up on the MB else I would've opted for them. It makes pentamelding so much simpler. For a hardcore endgame crafter who pentamelds with Vs, they're so much better than the crafted version.