I know you're still trying to fill all the other spheres, but:
Time Sphere:
Sorcery
Time 1: Stutter; has a chance of giving a -15% strength bonus and -15% withdrawal chance to every unit (or a selected unit) in a stack.
Time 2: Mature; gives an experience boost at the expense of base strength to a selected unit. Could perhaps have different affects on vampires, werewolves and non-living units.
Time 3: Bubble; can only be cast on cities. the spell doubles the production, commerce, science, maintanence and food consumption of a city. Perhaps also causes unhappiness if used many times / over prolonged periods?
Summoning
Time 2: Borrowed time; a defensive spell, the first unit to be destroyed in the stack (if the caster did not cast a spell the previous turn) will be 'ressurected'. If killed again, he will be gone forever. The unit will not survive into the player's next turn. More of a spell than a summon I guess, but eh..
Time 3: Grim reaper; Yeah, I'm running out of ideas.. gains power for every unit killed within 2 tiles whilst he is on the field? Perhaps this would work better as a death summon. Could use a better name too
Hope you like some of the ideas!