Elemental King/Queen summoning limits?

[Yossar]

Cohen said:
Not so good amazing battle-magic.
It's good if you've massed guys and the enemy are few and lacks of MR, but otherwise it's better elemental magic.

Astral lacks offensive battle spells, but Antimagic, Will of the Fates, Doom, and Astral Healing are all great support spells. And relatively cheap, especially if you can bring in some communion slaves.