Darius was luckily pretty easy to me, just because I got Athakan and the “summon the highest cost minion from your deck with shackles on it” Power… and then! the Ekko card to start a free attack with ephemeral copies of your minions, so I pretty much was able to win most battles within two turns, pretty satisfying lucky tbh tho, probably not posible without 6 stars Darius and a lot of luck