For PLD it would be...
Base skill level is 276
Kaiser Schaellar: +6
Shield Torque: +7
Shield Earring: +3
Knight's Earring: +5
Gallant Leggings: +10
Bringing the total to 307.
Things I left out:
Shield Belt: +3 (What is the latent on that?)
Light Buckler: +5 (Debateable tho, I mean, Lv.40 Shield at 75? )
Apologies in advance if my research is flawed and I missed some items, but this set up still allows for a decent amount of Enmity+ gear. Can't remember off the top of my head if there are Shield Merits. If there is, how much can you get?
Also, what is more important for PLD using a shield, Parrying or Shield Skill? Obviously tanking with Staff only Parrying applies, but with Shield parrying plays a role also.