Conjure Celestial, Aid, Guardians of Faith, Geas and others are great spells for the Divine Soul.
Sorcerers tend to be good at damage spells like Evocation, Illusion Spells, and Enchantment spells with a few odds and ends. Clerics tend to be good at healing spells, both damage, death, and conditions, conjurations, necromancy (creating undead), radiant damage, and buffs. They focus on totally different areas, only the Divine Soul can bridge them and combine with metamagic.
The Coualt one conjurers up with conjure Celestial can cast 22 spells, not including the 3 it can cast at will, can change it's shape to any CR 4 animal or human at will (including some with innate magic spells it can use), has a poisonous bite that it can use in other forms with a bite, like Sabre Tooth Tiger. It flies in its natural form, reads, writes, and speaks all languages, has telepathy, and a few other things. Seriously extend spell Conjure: Celestial to conjurer Coautls (the only CR 4 Celestials) are worth being a Divine Soul by itself.
Then there are spells like Planar Ally, Temple of the Gods, Commune, Holy Weapon, and others.