I don't understand runecraft or wild magic yet, but as for tier magic I can Imagine super tier summoning magic such as the offering to the dark goddess but a holy form of it. One that summons a super tier Angel.
Resurrect all human units in the affected area. Units with a level lower than yours are transformed temporarily into archangels and equipped with flaming swords and holy shields before being returned as normal with a level deduction.
Pinnacle of Heaven
Summon Guardian of Eden, an archangel with your level equipped with the flaming sword of Eden to protect a stationary building or structure until death.