Does Ryleh and Atlantis have an unfair advantage?

[Taqwus]

Hm. I've never really grokked how to use the sea nations well; have problems maintaining dominion, or taking out the tritons without losing too many units/commanders in the initial counterattack.

The astral-heavy sea nations do lose somewhat in Dom II with the harder Dispel (which cannot be cast from underwater!) and the harder and restricted Gateway.

R'lyeh seems pretty wacky; if you send a Starspawn into the Void Gate, perhaps you lose the action of a 150gp commander for no gain that turn, or it could be feebleminded, maybe he and his bodyguards are massacred... or perhaps you gain an incredibly powerful sacred unit that can move in water or fly 10 land provinces a turn if you Gift of Reason it (I don't know of any commander which can match that mobility; might be one but I haven't seen it yet)... it's a bit wild of a gamble.