It would greatly alleiviate their suffering if you were to pray for them.
That's the thing, what I posted says they WANT to suffer and be where they are.
they want to suffer because they want to be with god in Heaven. They are living in perfefct charity and they want only what God wants.
However in the case of these private revelations God wants us to pray for the souls who are suffering in Purgatory. Otherwise he would not allow them to appeear and ask for prayers.
If you were to see someone in the desert suffering from a great thirst wouldn't you offer them a cool glass of water if it were in your power to do so?