I will first admit that I haven't gone through most of the thread (I read the last 3 posts because graphs are beautiful!). But I will attempt to answer the OP:

At our current gear levels, critical hit finally passed the point where "DH scaled better" because of its constant linear scaling. But we cannot reach any point where "enough x stat is enough" unless it is skill/spell speed but that is due to the stat's nature, not scaling (not affecting oGCDs, throwing GCDs off alignment with our own or raid buffs, etc).

The short answer is: If a piece of equipment can take it: Go for critical, next is direct hit unless you can break a SkS or determination threshold. Since you are a dragoon, here are a few "Best in slot" examples (credit goes to the Balance discord):

2.43 New and improved BiS (Eureka included)
http://ffxiv.ariyala.com/18LZD


2.45 (old BiS)
http://ffxiv.ariyala.com/175G9 (High Crit; 2.45 GCD)
*Crafted pieces hit stat tiers cleanly and have premium stat spreads.


2.17 high sks set. (Eureka included)
http://ffxiv.ariyala.com/18LZE

If you do not like fast dragoon, the 2.42 set is the 3rd best option. Is is not considerably worse than the 2.19, but the gcd tier is slightly awkward.
http://ffxiv.ariyala.com/177ZA (2.42 GCD)