When I did them with a friend who had not unlocked everything and didn’t even have the base sanity resist yet so was dropping dead every 5 seconds, I also realized there does not appear to be a way to do a normal res. I could not click on anything and did not see any element of the UI that would let me res them outside of dropping an orb. I also couldn’t cast res on them as a healer.
I also thought it was odd that it didn’t just use my hourglass talents since I had started it, but I guess that might be intended.