I will usually attack Special stages in season 1, but since it's Atlantis Rise, let's attack season 2 maps for chances of Seadragons.
So I choose this stage. 4 world energy needed.
Happening in 4 waves, which is great for the chance of Seadragons to appear.
If one is very lucky, all the enemies here are Dark element.
And of course the funal round where three of them all Dark.
4 world energy in exchange for 2K XP and plentiful recruits. Leather strips are bonus. I really need them to make small mana potion for titan attacks.