I grab all the magical items and stuff them in the bag of holding.
"They are probably watching the front door. We should go out the back, but we'll have to make our own exit. Robert, can you work on that? Meanwhile, I'll try raising an alarm. Maybe if our enemies think reinforcements are coming they will be less likely to re-engage."
I cast "ghost sound" out front of the building and mimic a ringing bell. As loud as 16 humans shouting, so should attract plenty of attention.