Simply play Astral with Nidalee as your carry. Having Astral early will also help you get some extra copies of your main carry or just some extra gold to use for rolls. Level up to 4 at stage 2-1.
Mid game you can slot in Guild or Jade to make your main carry Nidalee stronger. It's important to note that you DON't want to level up to 6 before you hit Nidalee 3 star. Level up to 6 after hitting Nidalee 3 star (Latest around Stage 3-7).