Dorothy Must Die POV

My book is told from first-person point of view. The story is told from Amy's point of view. She is the main character of the story and Dorothy's nemesis. Amy has sort of the same storyline as Dorothy. She was in a tornado, her house crashed into Oz, and she has to stop the evil ruler. I feel if it was told from Dorothy's point of view it would sound more vengeful and self centered. she would say something like "That girl cannot take me down, I will strip Oz if all its magic in order to defeat that knock off version of me !!!!" "She just wants my power, that can be the only reason she is here." "I'm beautiful and everybody adores me!!!" That's an example if her speech it will just be about her and not allot depth in the story line because it will just be about her. It's different with amy you learn about everybody story because she has to learn the reason why she is fighting for the people of Oz.  I just believe the narration would be an reliable resource if it was told from Dorothy's perspective. the storyline would also change on how we know they'll defeat her. Dorothy doesn't know how she gets defeated, so that will just deprive us of knowing what plan they cultivated.