With regard to the extra spheres, in my (yet to be released) modmod I use the following spells. Some have been borrowed from other modmods, the others may be horribly unbalanced
Creation: Creation mana is available with Divination. Creation mana counts as a health resource.
* Growth (Creation I): Adds 2 food and 1 health to a city. Keeps 10% of food storage after a population increase. (Rise from Erebus)
* Fertility (Creation II): Allows to switch between different health resources of the same type. The different groups are "Wheat, Rice and Corn", "Cow, Sheep and Pig", "Banana, Sugar and Cotton", "Deer and Fur" and "Clam, Crab and Fish" (Rise from Erebus).
* Blessing (Creation III): Allows the city it has been casted in to build living units faster (20%). All living units created in the city start with the Strong promotion.
Dimensional: Dimensional mana is available with Necromancy. Dimensional mana penalizes diplomatic relations with most civilizations. It is associated with unholy damage.
* Escape (Dimensional I): Teleports the caster to its capital (Rise from Erebus).
* Unsummon (Dimensional II): Banishes nearby summons. It can be resisted. (MagisterCultuum).
* Expel (Dimensional III): Expels nearby units forcing them to move away from the caster. It can be resisted.
Force: Force mana is available with Alteration. It reduces maintenance in 5%. It is associated with force damage.
* Temperance (Force I): Adds the Temperance promotion to all units in the caster's stack. This promotion adds resistance to both Holy and Unholy damage (MagisterCultuum).
* Magic Missile (Force II): This spell creates a force projectile that can attack the weakest unit on a stack.
* Summon Runewyn (Force III): Summons a powerful angel immune to magic called Runewyn (MagisterCultuum).