Deep Atlantean Mermail (Pre-ROTA)

Skeleton for an Atlantean / Mermail / Deep Sea deck, with Diva being a central piece and Minstrel a hell of a card. The deck focuses on swarming to convert into synchros and discarding to trigger effects.

Alternatives choices include Tidal fresh off the banlist (at time of writing), Poseidra because it has nice art, Abyssleed is a chonky boi, Lappis Dragon can be summoned if added of Bahamut for extension, Abyssturge a recovery option, Sea Nettle is an extender, Abyssnerei can pop Abysslinde to trigger both of their effects but it ain't too hot, Abysshilde is neat utility but you tend to discard stuff, and then extra deck and S/T choices (including a switcheroo of Chengying for Bihamut as a better lvl 10).

Haven't tested enough.