Rubius will help in whatever capacity he can. I first ask Falan if there's anything I can do to help him or his followers restore order here in the temple. Pending his answer, I help the choir members come to and restore their strength with a bit of food and drink, assuming I can get them to regain consciousness. I'll then make my way out to the horde of followers who were zombified by the glowing plutonium rod of unchecked evil.
After things are in relative order, I ask Falan, Allanda, and anyone else there who is of significant power about what the next steps are to prevent this new undead aspect from getting into the wrong hands. If I can help, I will. If not, I head back to the Veil with Kerkly to see my family.