I was watching some speed runs of the original Baldur's gate and the coronation is always taken care of quite easily by casting Otilukes resilient sphere on Liia, finishing off all of the dopplegangers and then staying out of sarevoks way. A novel approach I thought so I would give it a try, the coronation is always the most dificult part for me. It took a few goes as Liia has a habit of resisting, but on about the 4th try it worked, but when the sphere ended having killed all the dopplegangers I was instantly killed. I'm guessing this spell is diffferent now?

Nevermind, I see that spell is flagged as hostile as BG2