Sorcery Color tag templates(None) Game of Chaos Flip a coin
Merfolk have just 9402 decks over at EDHREC.com, which is a top 20 archetype at 17, but pretty low considering how often they were played in the old days
This list even runs two iconic mana creatures: Bloom Tender and Birds of Paradise
All four of these are also new
These would be a great starting point especially if you could tune them to your preference with the pool of Standard cards
The important thing, as always, is to remain flexible in your assessments and to position yourself to learn as fast as possible, but learn soft and fast, not hard and fast keep your positions flexible, as even once youve learned something you may find that your understanding was incomplete and you may still need to unlearn it again and learn something else.