If RIO alliance popped your moon, please write here ASAP. They've been popping moons and crashing fleets way too easily. If RIO has seen your fleet on lanx you can be sure your return is locked. But there are still things we can do to make their life more difficult than what it is now. We have options: try to def, although they have a lot of fleet, try to steal a hit, try to steal debris, get into follow ups, we have options to make their life more difficult.
If you are in trouble and RIO is after you, this is the place to ask for help, please reply ASAP.