Ok, right now the console meta is:
Sheggra / Jarl Firemantle
However, I have discovered that placing Valkyrie in slot 4 is just as effective as Sheggra or Jarl. Matches will go slower, but the win rate is still nearly 100%. If you still need souls, which almost everyone on console still does, I find this new team with Valkyrie a very good improvement. In exchange for a bit slower matches, you are getting souls at a far faster rate. I’ve played about 20 matches so far with this team and still have not come close to losing, even in the rare case where the AI gets lucky and kills Maw. There is regular mana runoff for both yellow and red, so Valk charges naturally. Also, if you have a very poor start when it comes to being able to charge Maw, a good viable backup is usually charging Valk, casting her spell, and clearing the board of a couple less useful colors to allow for a Mercy match of yellow/purples. If you don’t need souls, the original team is still the best (I’ve played quite a few with both Jarl and Sheggra, and I’d give the slight edge to Jarl) as you will run through matches faster than with Valk, but if you still need souls I would consider this an improved team considering your odds of winning don’t really drop.