I've gotten to 77 in the standard meripo format. Don't be afraid to simply function like any other DD, albeit with a few different features. Company sword / Joyeuse and /nin has done me well so far. Although, it is nice to have two other good DD's with you while doing this - PLD is no master of damage I'll admit, but it can hold its own. Also PLD works great as the 'first voke' with Flash, which feels more comfortable than say provoke, I must say.
Also Bibiki bay was interesting, Rampart was a huge boon when it came to gobbie bombs, and the bunnies hit atrociously hard. Sentinel was great to hold hate off the squishy DD's, I partied with a very good sam/war and sam/drg, and being PLD certainly helped me keep them alive (riding the Cover timer, and making full use of all my MP).
So yeah, PLD is very nice in Bibiki, and with the right gear and attitude it makes a fine DD. I haven't really approached leveling PLD mcuh differently to how I'll level my other DD's.
____________________________drk = 80 sam = 76
pld = 79 thf= 80
nin = 80 drg = 75
mnk = 76 war = 52 Retired for now ^ Screw you Abyssea.
FFXIV woo eh..