[Aezeal]

OK I'm not reading that first post but just trying to come up with some idea's myself

Astral:
- Ether Champion (allows for multiples of it and sounds strong in general.)
- (after having been in my earth section: ) Crystal Golem, could have luck (onebattle), eyeloss, horrormark (those last 2 are pretty extreme), resistances for everything if needed.
- Shapeshifter (multiple forms for multiple needs, could have any power, could have a thug version of it and a shapeshifter lord as SC version.)

Nature:
- Vine Giant. Could be anysize, could be any strength, could have a whole lot of abilities (reinvig, regen, entangle) and full slots.

Earth:
- Iron Golem (or some other metal golem) same as vine giant could be anysize, could have reinvig, high prot, any strength, trample, quite some resistances if needed, full slots.

Water:
- Living whirlpool (not something for slots, so not really what you wanted, could even be a unit not a leader) could be just powerfull and with a devour attack that can kill anything.

Air:
- living hurricane: same as above ... ok air elementals resemble this but this would be way more powerfull.. if you want to keep air somewhat balanced (not a fill scale SC) this could be an option as commander or leader.
- Thunderbird (has been done somewhere as a modded summon somewhere)

Earth/Fire:
- Awaken Vulcano: immobile vulcano which can attack with streams of lava upclose and shoot fiery boulders at range. A defensive powerhouse, could also be a mindless trooper needing a mage to control it.

Fire:
- Efreti (I've had them in a mod, just not as sc quality but could easily be anything you want) fire mage, heat, fire shield etc etc are all option.