Oh hey, somehow I glanced over this thread and didn't notice it.
Critical hit based on TP WS's (like Hi and Jin) always do much better damage when you actually get the critical hits. So it's best to gear for that, then depending on the WS and the way it works, stack ACC/STR/ATT/WS mods, whichever ends up being best.

With RR and GH and cruor buffs inside abyssea, you can be sure your crit rate from dex is capped and that +50% crit rate from atmas is going to pretty much guarantee you get those crit hits. So stuff like Loki's over AF3 body is obviously going to be better. Outside abyssea I would suggest trying to break 130 dex and using as much +crit rate as you can get. At 90 I parsed for awhile on aura statues (lolullipopfarming), and a bit in einherjhar, and a bit more at mammool ja sp on mammools. My WS average was 300-400 higher with my outside abyssea WS set on, compared to my inside abyssea set.
you can view them here:
Inside: http://www.ffxiah.com/item-sets/197129
Hat is 4str ws acc15, and 4agl ws damage +2%, my fSTR probably isnt capped and definately wont be with the 99 kannagi, but my +crit damage is capped, and I keep yonin up full time so the acc isnt really terrible.
Outside: http://www.ffxiah.com/item-sets/197128
You could probably argue against the cape and hat, but I'm sticking to my story that +crit rate is best. Which is why I also include so much dex in this build. I have 133 total on my mithra with this.

The only thing I want and do not have is a 4 agl earring. I think that would probably do better then the 10 att one, but it seems useless to buy one. Every update they've added new higher stat earrings, so it would probably be a waste to buy one now. Unlike the rings, the HQ is the good one, at least with the rings its just a synergy synth to get the next tier up, and they dont HQ. So that seems safe IMO.