Tier 1
TPC Comments
D/D/D is generally considered to be the strongest deck, as it's the most well-rounded and consistent at producing its boards. It is also the most versatile deck, with multiple gameplay options available, all easily facilitated by Command of the Doom King and the wide birth of searching Loading... and Loading... provide.
D/D/D remains the best deck in the format right now, with nothing much changing from the last Tier List. It is still the deck to beat right now and the format kind of revolves around this deck. Expect to see more D/D/D hate in everyone's side deck for this current format. Nothing much else to say really.
Tier 2
TPC Comments
Especially in non-side formats, where there aren't as many silver bullets like Loading... or Loading... , both Metalfoes and Gandora have proven to be quite resilient, both being able to generate resources, survive early pushes and OTK quite handily given the opportunity.
Gandora remains at Tier 2 because it still has a decent matchup vs D/D/D but still loses to Metalfoes.
With enough resources, Gandora can play through D/D/D's interruption by threatening Loading... and Loading... . Even if Gandora did not have lethal, D/D/D still couldn't recover after their whole field is destroyed. But if Gandora does not gain enough resources through Loading... , D/D/D can easily win vs Gandora.
While against Metalfoes, Gandora usually have a hard time gaining resources since Metalfoes can always push for lethal at any turn and setup interruption at the same time which is why Gandora always have a bad matchup vs Metalfoes.
Metalfoes stays at Tier 2 because it has a very good matchup against Gandora and Phantom Knights but still has a bad matchup against D/D/D. Metalfoes can setup a lethal board and interruption every turn which is why Phantom Knights and Gandora struggle to keep up with their pace.
While against D/D/D, Metalfoes always have troubles playing through D/D/D's backrow cards such as Loading... and Loading... , which is why D/D/D can always outgrind Metalfoes if the game goes longer.