My understanding is that the maximum you can increase your crit rate and damage by is 50% each - through gear or atma's, I am unsure if passive job traits are counted in this. DEX also effects crit rate and damag,e though I am unsure of what formula applies to it.

Also, Razed Ruins is of course 30% crit damage and rate, and as a THF you naturally have a higher critical hit rate anyway.

Regardless, in abyssea I crit a disgusting % of the time, absolutely more often than 50%. Most of the gear I have listed above is most effective outside abyssea, where atmas do not, of course, exist.

Sea Daughter is fantastic for fights where you cannot really TP against the NM so much....but, the increased rate of WS doesn't help much since I have to be a little...conservative....on WSing NMs. Is great for EXP aliances and cruor parties, though.