How hard is this?
3 Dream sequences, already in game, they are triggered when a player long rests x # of days.  Based on difficulty, 1st is maybe 6 days for Easy, 3 for Core, 1 for Hard.  Second is 4 days after that for Easy, 2 days for Core, 1 for Hard.  Etc.
Now add Lae'zel leaving the party somewhere before the first dream if you don't go get cleansed.  1 extra small cutscene.  Somewhere before dream one, another small cutscene about Rath interrupting the ritual.
I'm not talking huge numbers of cinematics here.
Nah. Whatever.