So the point of the deck is to fill up your opponent's BF with worthless units and not give them much chance to attack you. Meanwhile, my glow finch protects my owls while they make you discard cards. The end goal is to mill your opponent's entire deck and have them die from drawing damage.
Milling is achieved through hand destruction (so they have to draw 5 every round) and the finch dying several times throughout the game (great blood chains target).
So the usual first five is owl, dove, puppet, OM, then flex.
Vs charm I started fire archer for owl defense. Keep recurring it into your hand to protect your other cards. Props to Christian Pratt and Elliot Kramer's suggestion to drop one fire archer for an anchornaut. Even better.
Vs nature/ceremonial I FFed a Regress to take out their HK or bear.
Vs Jessa I swap out doves (too easy to kill and screams) for a dread wraith. Finch protects the wraith from Fear. I open memories round 1 for a 2nd blood puppet. She can't fear or scream them.
Aradel gets OM 2nd blood puppet book. Her BF 8 takes longer to fill, so room for more puppets (to be fair, I didn't face Aradel).
Saria gets double puppets and a dread wraith to redirect a hypnotize raven.
Vs Brennan-don't use puppets! He'll just spirit burn them. OM 2nd owl book and use it with doves and dread wraith. Redirect spirit burn damage onto dread wraith hurts Brennan badly. Much better than choke (credit to Christopher Pratt).
Coal-NO doves! Replace them with dread wraith and OM owls round 1. He can't slash you when the wraith is on the board.
Most other matches you use OM to get your second owl book. Leo mirror match is a chess game and hard to decide on FF, but double owl is essential or you lose the owl race.
One other note about poison and regress-don't forget that you can main action play it on your own finch and side action remove it to remove all exhaustion tokens from the finch. Great when your finch uses decoy to eat a blood chains and you don't have your own blood chains in hand.