Fita is more of a support card to help you restock your hand rather than a "I'm going to finish you with this follower" type of deal.
Based on the deck composition, you are trying to keep followers on the field and chip away at the opponent's health whenever possible, and make your followers increase stats repeatedly every turn.
Spring Green => Fita or Airbound is a pretty common pattern I see as an opening, sometimes Water Fairy => Brambles -- though how you want to play might depend on what opponent you are facing, somewhat - some opponents will do a lot worse if you are able to keep your followers on the field and remove all of theirs (eg. Cybele + Brambles - usually Cybele after you manage to keep some followers on the field) while others fare worse if you keep going straight to face (eg. Water Fairy => Fairy Whisperer => Fita + Spring Green => Faries + Elf Song => Faries + Elf Song / Leaf Man => etc.). It's possible that you might just have a bad match-up and nothing you really do is going to allow you to win so long as the opponent draws what they need.