If you're trying to beat Proudclad the second time, your best bet is to use Light, fang and Hope, with Light or Hope as the party leader. You'll start with Med/Syn/Sen, while Hope (who really Should know haste by now) Buffs out your party. Once your buffed, Go into Com/Rav/Sen for a round or two, and then Rav/Rav/Sen until staggered. If you're in good shape you can try going into rav/rav/com when he's staggered, but Com/Rav/Sen is your best bet.

After his stagger is up is when it gets hard. You need Med/Med/Sen while it's on the ground to heal from it's rapage attacks, and you'll do most attacking while it's in the air.

Oddly, you DO get access to Eden Pharmaceuticals after this boss, I think, so you could always buy shrouds from there