You’re trying to control the board initially so you can outpace them in mid game so I’d say to mulligan for 1 and 2 drops pretty aggressively. I love starting off Shimmerfly into Headhunter’s Hatchet. I usually don’t consider timber wolf a 1 drop in my mind since it just begs for removal and against mage or rogue it will almost always take a hero power to the face turn and save it for a turn when I can combo it with some rush minions to remove a pesky taunt or the likes