Consider Ocular Spell or Reach Spell so you can apply Persistent Spell to any spell. Persistent Delay Death is cool (plus Persistent Mass Lesser Vigor). Chain Spell Delay Death the party w/ a Metamagic Rod of Chaining. Persistent Righteous Wrath of the Faithful helps all the melees of your group plus you since it looks like you want to melee aswell. Recitation is also another cool thing to Persist. Chain Superior Resistance later on.
Uhmm.. There's more, but that's what I remember of the top of my head on Clerics from here
and various other threads on these boards. Search function is your friend.