I propose to discuss it here.
I see that for a "good" playthrough, Laezelle must renounce Vlaakith, renounce her right to become the Chosen One, and save Orpheus
For the evil one, it would be more logical to accept Vlaakith's offer, kill Orpheus and gain power.
Vlaakith really kills all githyanki who have reached level 16 for the exp, according to the lore of dungeons and dragons, deceiving them with ascension.
I haven't beaten the game yet, but I wonder if Laezel can avoid this fate and rule forever, if she remains faithful to Vlaakith.