2 tips against quest warlock:
1. vs the combo variant play around pluge of flames(remember – they do not play giants)
2. vs the 4 giants variant use the advantages of not running the quest- (1 drop turn one, +1 on the mulligan) to put giants as fast as possible(careful – this is not linear – try play around pluge of flames if you can but also try to set up lethal if you can)