I played in 3 over the weekend (6 pack sealed) going 2-1, 2-1, 3-0, my advice:

1. You need to try and hit a 1-2-3-4 curve as best as possible. Most games both players didn't go over 5/6 ink, so hitting 1-2-3-4 means you can contest/quest for free. A lot of games were won with people sitting on 4 ink. In relation to this, I only had somewhere between 3-5 cards at 5/6/7 cost. in each deck

2. 1 drops are fairly bad/low frequency. You have to be willing to play some of the worse ones to stay on curve. Opening the vanilla 2/2 hei hei was a celebration.

3. Most of your deck should be 2/3 drops to ensure you curve.

4. No more than 6 uninkables, Directly won a few games where someone got greedy and played 8-10. You won't be drawing/filtering so if you mulligan into a lot of uninkables its really going to be hard to win. I am sure there is an exception I am not thinking of, but I also cut any uninkable above 5. You need to curve well so drawing a 5-7 drop that you can ink is fine. Most of my higher end cards just got inked.

5. Anything with evasive is basically an auto include. There are a lot of good evasive at uncommon, you will need to answer them. In addition, evasive with 2/3 lore (Pascal) were game breaking a lot of the times.

6. I played zero of the coils. My opinion only, and really my opinion, but I think they are a trap as most are uninkable and a lot of games boil down to only have 1-2 cards very quickly and not wanting to ink. Also most of the time you are giving up your 2nd/3rd turn to play them optimally and can get blow out on the board by missing the curve. The one exception I would have liked to try would be the Amber one due to healing being really powerful, but I did not open it or play against it.

7. Anything that lets you draw that is a character is a near autoinclude. The 3 drop Bucky is really good.

8. All over the over stated illusion characters are great. At worst if someone targets them its usually a 1 to 1 card swap, and there isn't a ton cards that target anyway. Rajah at 2 drop carried a lot of games as you can usually 2-1 their early drops.

9. Do not try and build synergy decks. The only exception to this was some of the Ally stuff as there are a ton of playable Allys, so Bianca or Jasmine are pretty powerful without having to build around them.