While we're still early in the meta, a few tournaments have helped to decide which sets are most relevant to the current game, so you should check out our guide to see which suits your playstyle
Speaking of Xyzs, however, we also have Mermail Shadow Squad, who is always treated as an Atlantean, and can let you discard a WATER monster to change the Levels of all WATER monsters you control to 7 for the turn to make Mermail Abyssgaios easier and potentially slap the new Poseidra Abyss, the Atlantean Dragon Lord on top and Link it away to get back 3 Level 3 WATER monsters, plus he can detach 2 materials from himself to return up to 3 cards the opponent controls to the hand
For those of you just meeting this archetype for the first time, you may notice that certain Alien monsters that interact with A Counters have a specific line: (If a monster with an A-Counter battles an Alien monster, it loses 300 ATK and DEF for each A-Counter during damage calculation only.)
After the Swiss Rounds are complete, there will be a cut to the Top 8
The item machine, and the halving of DP in Free Duel Mode, remain as in Tag Force 5
So, after spending several days testing goat control and Flip Warrior, neither managed to convince me