How can I optimize animations for an android build?

My team and I are working on a 2D card game for a client that has 150+ cards that are GameObjects, all with separate animators and scripts.Due to these large files and the way they are loaded, the app crashes on mobile devices with anything less than 3 GB of RAM. All of the cards are set up on Start and are off screen, out of the player's view. We are wondering what options we would have to reduce the processing requirements of the app. Thanks!