Disclaimer: I hated Enslave 6 assimilate with passion as I thought it was the strongest deck which is unbeatable last season. I used to face it close to 50% of the times and I think I would win 20 or 30% of the times if I had luck. I was disappointed that Enslave 6 assimilate was not nerfed this season. So, I wanted to try it myself to see how it works to know its weakness. This is my result/verdict.
In short: E6A is not as strong as I thought. And I would even go as far to say it has major weakness which almost always gets exploited. I reached a max of around 2480 and then fell hard. This is usually the most I had ever climbed till now, but previously with ST decks. I thought I would easily waltz to 2500, but the deck didn't help me to reach there. My hard cap/max is what I could reach.
I have changed my opinion on some of the cards after I have played them:
I had Anna and I thought she was one of the most broken toxic cards, but in fact, I removed her later too. When getting pushed on R2, she plays for such a junk low tempo that she was not worth it. She is good with PF as opponent, but most of the times you face Renfri and she only copies one part of the ability and more often she played for far too less points that I cut her from deck.
Also, I have never managed to win even a single time against Harmony, be it GT harmony or Harmony harmony. The removal and tempo of NG top end cards couldn't match Harmony (but I was happy when I lost to ST ). I never managed to win against NR knights deck. Most of the times getting 2-0 against these decks. Or any deck which has Aerondite, this deck pretty much loses to it.
So, it might seems extremely unfair, but trust me, Enslave 6 assimilate is no way OP. It is a good deck and I have to admit that it is actually very very fun to play (especially against good Enslave 6 opponents - as you can't Calviet in R1 and you can't play Anna - it is so much of cat and mouse fun). Apart from Vilgefortz, I think all the other cards are Strong/good/forgiveable. If you don't trust me, you try it yourself.
[BTW, my points regarding Vigo, Nauzicaa Sergent and may be Torres and other things were already mentioned by @Philido. When I read his replies, I didn't appreciate/realize them, but they actually matter.]
In short: E6A is not as strong as I thought. And I would even go as far to say it has major weakness which almost always gets exploited. I reached a max of around 2480 and then fell hard. This is usually the most I had ever climbed till now, but previously with ST decks. I thought I would easily waltz to 2500, but the deck didn't help me to reach there. My hard cap/max is what I could reach.
I have changed my opinion on some of the cards after I have played them:
- Calviet: Did you know that you can miss him on red coin? I have missed to draw him more time than I would have liked. On blue coin, you never miss him I think, but on red coin, I have missed him quite a few times. And when you miss to draw him, you are almost guaranteed to lose as you deck wont have any thinning or tutor.
- Due to Calviet, if you don't draw your low provision removal cards, you wont draw them. There were times I wished I had some low provision removal cards in R2. This may not seem like a big deal, but it is when you need to damage a card so that you can seize it.
- Terranova: This card is still too strong. In a way, the whole deck relies on him to win the game, in a way. He is the Saskia/Simlas, Sova/Fucusya of other decks. Insanely strong, but is forgivable as it is mostly the win condition.
- Torres: The card I hated the most last season, but he has a unique issue. You have to play him early so that you play Calviet later to arrange your deck and if and when you play early, he almost always gets poisoned/destroyed/reset. Torres in R1 is absolutely necessary for the deck otherwise, it is nearly impossible to win the round without card disadvantage. Also, he guarantees that Terranova is valuable in the round you want to win.
- His second ability is actually weaker and I never liked as much and it is not worthy of 14 provisions.
- Skellan: A very strong card which has too much synergy with assimilate as well as removal. But I still don't think this is OP. This card forces an E6 which has its own conditions (like you can't have heatwave).
- Vilgefortz: I still think he is too good for his provisions. He should be either 10 provisions or 3 power. Vilgefortz had screwed me in some games by summoning a stronger card, but in more games he had given me cheap victories. Destroy Vanadin and pull Simlas/Henson, destroy Torres and pull Terranova, etc. Truly a disgusting card which needs a bloody nerf. The only card in the game which can remove two win conditions from your opponent deck.
- Vigo: I used to hate this card, but the condition that the deck should only have 3 bronze for guaranteed soldier spawn is actually a big pain. Otherwise, in R3, he may not be as good. His only strength relies in the huge tempo with Nauzica soldier and for that to work your deck should only have 3 bronzes. So, I think he is OK.
- Bribery: It can be named as Binary. It either pulls the most powerful card or it can give the shittiest card. It is just a coin flip and I really hate this card. Not because it is OP. I remember it screwing me almost the same times as it helped me, but the 100% RNG on this card is just disgusting.
- Nauzica Sergent: The R3 win conditions. In a 3 card R3, almost no deck can beat these cards as they have huge tempo. But this card has a HUGE disadvantage. If you draw it in R2, you can't shuffle it back and you can't keep it too as you will play for 4 points. This card makes R2 bleed a nightmare. If your hands have junk 4P card, you can't mulligan them as you will draw this card and you can't keep them. So, I forgive this card.
I had Anna and I thought she was one of the most broken toxic cards, but in fact, I removed her later too. When getting pushed on R2, she plays for such a junk low tempo that she was not worth it. She is good with PF as opponent, but most of the times you face Renfri and she only copies one part of the ability and more often she played for far too less points that I cut her from deck.
Also, I have never managed to win even a single time against Harmony, be it GT harmony or Harmony harmony. The removal and tempo of NG top end cards couldn't match Harmony (but I was happy when I lost to ST ). I never managed to win against NR knights deck. Most of the times getting 2-0 against these decks. Or any deck which has Aerondite, this deck pretty much loses to it.
So, it might seems extremely unfair, but trust me, Enslave 6 assimilate is no way OP. It is a good deck and I have to admit that it is actually very very fun to play (especially against good Enslave 6 opponents - as you can't Calviet in R1 and you can't play Anna - it is so much of cat and mouse fun). Apart from Vilgefortz, I think all the other cards are Strong/good/forgiveable. If you don't trust me, you try it yourself.
[BTW, my points regarding Vigo, Nauzicaa Sergent and may be Torres and other things were already mentioned by @Philido. When I read his replies, I didn't appreciate/realize them, but they actually matter.]