So maybe this isn't a specific way that Rosi here would proceed with, but rather it's a suggestion he'd make. It seems like we have the potential for two or more groups all going in and out of the HQ. He would suggest that at some point the group that actually takes the orb out of whatever place it's in would then hand it off to another group that can run with it, while the first group continues to act like they have it and make themselves a big distraction so that the second group (or maybe individual) can exit in a different direction.

If a single person ends up running with the orb at any point, he can silence them completely - which isn't invisibility but hey, every bit helps, right? If they want this, they'll just have to be aware they can't verbally call for help if they need it, but the network texting should still be usable to get ahold of someone, including him if they want the silence canceled.