Good points, thanks! The organizer advised chanters on what to chant:
“Ratana Sutta and Metta Sutta (as many times as you like) and if needed any other sutta such as Dhajagga, Girimananda, Bojjanga or another sutta at your discretion.”
Ratana: Discourse on the Treasures (aka Jewels Discourse) For overcoming disasters.
Mangala: Discourse on Blessings Recitation of what is true good fortune.
Dhajagga: The Banner’s Crest Recollection of Buddha Dhamma & Sangha for courage in times of fear.
Girimananda: With Girimananda. The 10 perceptions for overcoming illness.
Bojjhanga: 7 Factors of Enlightenment, referring to any of 3 nearly identical discourses recited to cure illness, better known as Gilana Suttas or Sick. (This links to 1st one or Pathāmagilanasutta, and the next two follow right after.) Recitation of the 7 Factors of Enlightenment for immediate healing.
Also, I’ll be surprised if no one does the Metta Sutta: Discourse on Friendliness Meditation