Mulligans
General Mulligans
Just keep the early game minions, you can't do your combos untill later on anyways so don't keep any of the mid to lategame cards. Think of the list more like a Control Warlock shell with combos rather then a hard controll archetype.
Aggro Mulligans
You have plenty of anti aggro options in the list and between all of theese loosing the earlygame should often not happen. Just heal them out into the lategame and win with Warlocks powerful tools
The website took away my description and mulligan guides for 3 of the matchup types, tried editing it, website didn’t let me.
So to keep a long story short, just play this if you’re facing lots of control/combo on ladder, thing is really good at taking out such decks