Dragoons: Crit Class with no Crit?

[NefGP]

This probably isn't possible however, because your crit rate, acc %, etc are based on your stats vs your targets stats.

500 crit might be 10% against one lvl 50 mob, and 30% against another.

It's entirely possible. Blizzard did it in Diablo 2 - whenever you hovered over your accuracy rating it would give you your chance to hit in % vs the last enemy you attacked. In XIV's case, it would probably be easier to just list your rates vs enemies of your own level, and assume the values drop accordingly vs higher level targets.