I had a hard time in diamond. I played Highlander Mage , Highlander Hunter , Quest Druit , Galakrond Rogue and it didn't work . Until I tried this deck. It's AMAZING. I went from Diamond 5 (with no stars) to Legend in 5 hours,
I played 31 matches : 23 wins and 8 loses . I played against mostly Rogues ( 12 matches ).
I hope you will enjoy this deck as much as I do. Hope you have a good day and stay healthy and good luck climing before the new expansion.
Edit 1 : I will post some ideas around the deck
This deck contains a lot of answers options. The invoke cards + Plague of Flames can respond to a big board for example.
Try to keep the board stabilized and then play a fully invoked Galakrond and summon 4 demons. Then , next turn , play Alexstrasza and it's gg.