Something I fiddled with a while back that is similar. It could stand to be updated I'm sure, especially the spells used. I also used Radiant Servant for the cleric, but of course that could be exchanged
Elven Cleric 6/RS10/Contemplative2/Heirophant2
Domains: Plant and Sun, then Animal
Feats: Chain Spell, DMM: Chain Spell, Quicken Spell, DMM: Quicken Spell
Heirophant Special Abilities: Divine Reach, Faith Healing
Grey Elven Wiz6/Incantatrix10/Archmage4 with Wiz1 substitution level
High Arcanas: Arcane Reach, Mastery of Elements, Mastery of Shaping, Spell-Like Ability (Stoneskin)
Feats: Skill Focus: Spellcraft, Spell Focus (x2), Iron Will, Extend Spell, Persistant Spell, Chain Spell, Maximize Spell, Empower Spell, Quicken Spell
Uses Cooperative Metamagic to Chain buffs cast by the cleric onto the party, and to make the cleric's self-buffs Persistant.
Buffs on party (all CL 25):
2 day duration: Chained Extended Magic Vestment, Chained Extended Greater Magic Weapon, Extended Heroes Feast, Extended Delay Poison, Extended Death Ward, DMM: Chained Extended Mind Blank
480 min duration: Chained Extended Barkskin, Chained Extended Resist Energy (x5), Chained Extended Freedom of Movement, Extended Chained Keen Edge, Extended Protection from Spells
Spells Quickened for in-battle buffing (using DMM: Quicken): Chained Shield of Faith
Incantatrix spells Quickened for in-battle casting: Chained Displacement, Polymorph x2 (both cast without increasing the spell slot)
Personal Buffs:
Persistant (cleric): Divine Power, Divine Favor, Righteous Might
480 min duration: Extended Shapechange (both cleric and wizard)
Equipment needed: Loads of Metamagic Rods of Extend Spell, and Pearls of Power, a couple of Orange Ioun Stones, a Prayer Bead or two, animated shields, defending armor spikes.
Benefits to the entire party: +8 to saves, +25 to AC (counting Defending armor spikes once only), +5 to attack and damage; Immune to fear, mind-affecting, scrying, death effects, poison; Freedom of Movement, keen weapons, 30 resistance to all energy, all healing Maximized automatically, total concealment, Polymorphed into combat forms.
Spell slots used:
Cleric: every other day: 1-1st, 1-2nd, 2-3rd, 3-4th (1 from Pearl of Power), 2-8th
Cleric: at least once daily: 7-2nd (4 from Pearls of Power), 1-4th, 1-8th, 1-9th
Wiz: at least once daily: 1-3rd, 2-4th, 1-9th