It's really a bummer than you can't really make a DET/CRIT gearset (with 470~ ACC) without having access to Turn 5 pieces (MNK Body and DRG Wirsts), with pre Turn 5 gear if you try to up CRIT your DET plummets and vice-versa.

I've been stuck in Turn 4 for quite a while now without any signs of beating Turn 5 anytime soon like pretty much everyone else (It starts to remind me of XI's AV, who knows when it'll become "killable"), so for now I'm gonna work towards a CRIT/Skill Speed (while trying to maintain some DET) gear set.