oh i just posted my opinion over Nusku's sash in a ffxiah thread lol. I'm starting to favor it as well, reason being that the af bonus can't beat the 8% gain from extra 5 dw. Here it is

Your math isn't complete though Arcon, the numbers are actually smaller. You also need to factor that the af bonus won't happen on ws, so you need to multiply the gain by the dps % of our damage(60% to dps 40% to ws usually). I've mathed this on alla some time ago.

The numbers i used were 5% proc with 5/5 af and 3% proc with 4/5, and also 44% triple and a fictional 27% triple.

Even tho the proc rate from 5/5 is bigger, we would need to use tiercel neck to keep up with haste instead of using an attack piece. But attack is still a very big deal to thf. So coupling the boost from love torque (or agasaya) + capped haste with the smaller 4 pieces proc rate will beat the big 5 af pieces boost. If only our af feet actually added something to increase our damage...well, we wouldn't have much reason not to go 5/5 af lol. But even so, if it was something like attack (that people usually over look) it would be well worth it to use 5/5 af. Of course, this is all taking those proc rates to the af boost.

But anyway, this is a nusku's discussion. And the gain from nusku's sash alone will beat the gain from going 4/5 af instead of 5/5. But we do have to sacrifice much to put nusku's to good use. Naming: our af hands. This is a really heavy piece on our arsenal, specially if we need that acc. If we happen to need the str to increase fstr...those hands achieve godhood... lol.

So yeah, i'll go after nusku's and put it to use against normal mobs and weak nms. But against a high tier nm, 4/5 af gogogo!