They can cater to themselves by reprogging as a DPS if they struggle healing the content with a literal sheet of paper telling them what button to press when. Again, no amount of catering is going to make them good players. It's an ultimate encounter, it's supposed to be difficult and clearly some people aren't made for it. They should just play a braindead easy dps job with no responsibilities like you do or wait until the fight gets powercrept in Evercold if they CAN'T MIT/HEAL A FIGHT THAT HA A LITERAL SHEET OF PAPER TELLING THEM WHAT TO DO.