Ragha, Dual Kingdom.
I don't know much bar having tested them in SP. They are a weird mix of Abysian and Caelian units, with the added perk of having two sets of recruitment, one for cold dominion (Caelian-based) and the other for hot dominion (Abysia-based). If the temperature is not right, they cannot recruit the "proper" troops.
Magical variety is good, with Fire Death Blood Air Astral and Water, plus their troops are nothing to scoff at, with good Caelian archers with composite bows and Abysian infantry and cavalry more than good enough to keep at bay human enemies. Summons are quite expensive but kinda nice. They have access to an insane number of possible SC chassis, and the Zhayedans are probably one of the best Sacred units around (with N9, the only reliable way I've found to kill them is Frozen heart spam),
As for why Ragha is ruling the Hall of Fame, I have already said that all this match is a desperate war of containment against KoolNoodles, that was left for about thirty turns quiet and alone to build an impressive gem base and summon Ice Devils/Archdevils/Elemental Royalty/Vampire Lords, thanks to Caelum keeping up a suicidal war against me just because.
KoolNoodles can probably paint them better, however. I've only killed them in MP.