21 Domains.
Deity: Sovereign Host (adapted to have Heironeous or equivalent)
Alignment: LG/LN
Race: Elf or Half-Elf
Shaman (OA) 1 War, Planning (Weapon Focus, Extend Spell, Persistent Spell)
Cloistered Cleric 1 Knowledge, Undeath, Time (Extra Turning, Improved Initiative)
Cloistered Cleric 2 (Worldly Focus)
Cloistered Cleric 3
Ordained Champion 1 Domain
Sovereign Speaker 1 Spell (DMM: Persist)
Sovereign Speaker 2 Domain
Sovereign Speaker 3 Domain
Sovereign Speaker 4 Domain (Skill Focus: Knowledge (Religion)
Sovereign Speaker 5 Domain [4th level Cleric spells = DMM: Persist Divine Power = qualify for Divine Crusader]
Divine Crusader 1 Domain [1st level DC spells]
Contemplative 1 Domain (Dragonfriend) [2nd level DC spells]
Divine Oracle 1 Oracle [3rd level DC spells]
Seeker of the Mystic Isle 1 Travel [4th level DC spells]
Church Inquisitor 1 Inquisition (Toughness) [5th level DC spells]
Sovereign Speaker 6 Domain
Sovereign Speaker 7 Domain [6th level DC spells]
Sovereign Speaker 8 Domain (Open Feat) [7th level DC spells]
Sovereign Speaker 9 Domain [8th level DC spells]
Dracolyte 1 Glory [9th level DC spells]
Domains: War, Planning, Knowledge, Undeath, Time, Spell, Oracle, Travel, Inquisition, Glory, 11 others.
(Some required, others just too helpful not to take, like Spell)
Charisma synergy between DMM: Persist and Divine Crusader's Charisma-based casting.
And STILL 9th level spells.