Cleric spells

[drdevoid]

This advice may be too basic for you, but here goes. There are really quite a few "mass" spells that would work as buffs for your party.

"Aid, Mass" is one. "Prayer" is another.
"Resist Energy, Mass" is a great one that is borderline broken.
"Spell Resistance, Mass" is cool.
"Quick March" is awesome for giving a group extra movement especially if Haste isn't available (and if you are casting "Righteous Wrath" a lot it probably won't be).
"Conviction, Mass" is excellent for buffing saves at mid to high levels if you use extend spell.

There's also a lot of great defensive minded options as well. I love "Downdraft" for combating fliers. "True Seeing" with "Invisibility Purge" or "Dispel Magic" are almost mandatory in my games. "Break Enchantment", "Panacea" and "Heal" are a no-brainers. "Resurgence" and its mass version are wonderful.

"Lion's Roar" is fun combo spell that buffs and deals damage.
"Moon Bolt" also has multiple uses.
"Bolt of Glory" is a nice variable damage spell that really blasts undead somewhat like "Searing Light"

"Knight's Move" is a neat though situational movement spell for a melee minded Cleric.
"Fell the Greatest Foe" is very useful especially if Quickened.
And one of the personal best buffs I've seen (short of using Divine Metamagic with Quicken or Persistent Spell) is "Miracle" -> "Giant Size".

 

[Victim]

Recitation and Mass Shield of Faith are other good party buffs. Prayer also helps since it affects enemy saves and damage rolls on both sides, but it largely overlaps with Recitation.

Clerical energy protection is very strong with Resist Energy (and the mass version if allowed) for normal attacks, Protection vs effects like Dragon breath, and Energy Immunity at high levels - especially with a bit of prep.