Peridot is super grateful for Rita's offer. She wants to help the serpent but also Steven and Amethyst are out there somewhere and she is desperate to make sure they're safe? She thinks that there might be merit to the idea of getting Samyaza's help in either having the Serpent join the fight, or to communicate that they may have the means to help her somehow. Peridot's other idea is to communicate to RM somehow to try and draw Lilith out over the barrens, and basically bring the mirror to where the serpent is.

These are all just rough ideas she's got going, but she trusts Rita to handle the situation.