You'll be hard pressed to find people here on CI who'd consider praying prayers from Faustina's Divine Mercy when their loved one is dying, when they have the rich treasure of the Church in the Rituale Romanum to choose from.
So, the only one besides this poster here^^^^ who's promoted "Divine Mercy" was Nishant, and he's been banned (a few times).
I beg your pardon?? When have I ever promoted Divine Mercy????
Do I believe in the divine mercy of God...absolutely!
Do I believe in Faustina and her divine mercy devotion...absolutely NOT!!!!
The Rituale Romanum:
https://sensusfidelium.com/wp-content/uploads/2018/06/Roman-Rite.pdf
I definitely wasn't referring to the 1964 Rituale Romanum. I was referring to the 1947 which most people here on CI accept as the last traditional edition.