Hello everyone, i need to seek some input on the following spell selection, for a forthcoming BBEG fight. I am trying to be sure that it will be a fair fight that will not leave the players with a bitter taste afterwards.
The BBEG will be a 19 (not 20 because that nat-20 on the initiative roll is too much) level Diviner Wizard and the party of 5 has an APL=16.
On the First round of combat, the BBEG will cast Time Stop, then Prismatic Wall, followed by a Wish that will emulate Control Winds, which will create a tornado pushing the players towards the Prismatic Wall with a Fortitude DC and a Strength Check as per the rules. If there is another round of Time-Stop, the BBEG will summon Greater Air Elementals that will try to push those who stood their ground onto the Wall.
I have already asked my players if they are ok with their opponents being played to their best potential, and they have no issues. Also the BBEG (who is more or less an ambiguous personality) will beg the PC's not to attack him and leave peacefully. How would you feel against these odds?