I think the only level 1 summoning sphere is Death (Raise Skeleton, permanent), level 2 has Death (Summon Spectre), and I believe Malakim get Summon Sand Lion (Sun). Most of the level 3 spells are now summons though:
Law - Host of the Einherjar (Lasts as long as it keeps winning battles, including workers)
Chaos - Pit Beast (Same as Host)
Fire - Fire elemental (Collateral damage, fire affinity?)
Water - Water elemental (Waterwalking, water affinity?)
Earth - Earth elemental (Earth affinity)
Air - Air elemental (Spawns permanent lightning elementals, air affinity)
Metamagic - Djinn (+1 affinity for every mana)
Death - Summon Wraith (fear, death affinity)
Shadow - Mistform (Hidden Nationality)
Sun - Aurealis (+2 sun affinity)
Body - Flesh Golem (permanent)
I don't remember what Entropy is, but all of the rest aren't summons.