Focusing on the combo is pretty much all there is to do for a while there. It's the major complaint here about being a Paladin.

"All I do is stand there, stare at Titan's crotch and spam Rage of Halone...."

But... you also gotta position the enemy. Brayflox's story mode is where you come in to your own there, keeping the enemy positioned so it doesn't self-heal and doesn't toast your party members.

1-2-3... hit Flash every 20 seconds or so to keep the Blind debuff up... watch for and *anticipate* stunnable attacks so you can interrupt with shield bash... turn another page in the "Paladin's Weekly" fashion magazine... pop Rampart again... still alive? Good...