I just don't understand these Toon decks that focus on 3x Toon Mermaid: Toon Mermaid sucks. The only way a Toon deck can pay off is by completely focusing on Toon Summoned Skull and Toon Dark Magician Girl.
You got to tribute a monster to summon a high level toon.Mermaid counts as a SP(special summon). The order:SP a toon mermaid then you SP a 5 or higher toon.Two tribute are needed for 7 or higher toons.
Its pretty meh and practically dies from anything. High lvl toon can be special summoned as well so using non-toon monster as a tribute is still legit. You're better of running cards that thins deck/generate advantage like Bubonic Vermin and Legion, or beaters like Twin Barrel and Dunames
Actually, now that Sorcerous Spell Wall is available, you can play that field spell, then it makes Toon Mermaid's defense 1800 during your opponent's turn, and most low level monsters can't get over that without a boost.
And toon mermaid helps get them out, what else are you going to use to special summon toon DMG or toon summoned skull in one turn. They're not there for the stats ( not to me at least), they're there because they are great tribute fodders.