The safest choice is to remove the battery from the RCC, no more signal, no need for MARKs and doesn't require particular skill other that basic knowledge about electronics. But it means losing the Rigger and the RAM (or whatever equivalent) on the RCC.
If we can direct connect two people, Irris and I could probably get the Rigger out of here quickly, especially considering how fast it goes in the Matrix. Or Irris can try alone.
Last possibility is to dumpshock the rigger and turn off the wireless signal to try to keep whatever was going on the RCC.
The best possibility is the second imo, especially if we can connect two people.