50+ VIT isnt really such a good investment, once you hit +30 VIT your pretty much set with the exception of endgame.
I'd say go with shield torque, Raenryong is correct in saying it's the most important thing to boost if your looking for damage reduction, you can get acc from other departments (such as rings) and hauby, if your acc is still bad compensate with food if its fine then you can use tavnasian tacos to boost your damage reduction.
Be sure to negate the -agil from Hauby, it will harm your shield proc rate (maybe only slightly, still...).
The main thing people look for with a PLD in a party is that they hold hate well and don't drain the mages mp forcing them to rest and slow party down, if you avoid that really people should't complain about what gear you wear =)