I am stumped. I did not prepare Alter Fortune today - I swapped it out for Water Breathing since I was not expecting a major encounter because we were only supposed to be doing recon. I also do not ever have Revivify prepared. And I used all of my spontaneous spell slots (prayerful fist) on the Banishment attempt and the second Assay Spell Resistance #2.
Sadly, I don't know if there's anything I can do against an instantaneous death effect.
If you used all of your prayerful fists, then the only option is reincarnate. After discussions, with the attending clerics, based on Saladien's beliefs, Treetop would be the best choice to do that.
As luck would have it, Lady Veronia is not much of a ranger and is all cleric with her animal guarding skills, which means she does had access to 5th level spells. She does not, however, have the components. You will need to supply them.