Once you have the right amount of HP and Acc for a fight Det > Crit > Skill Speed > Parry is probably what you will want to prioritise. While Skill Speed is a small increase in dps it would only really be noticeable if you had bard and/or ninja in the party for TP regeneration. I have crafted i90 STR gear and with all the Skill Speed I am running out of TP a minute to a minute and a half into a fight while dps'ing on PLD.