I think she should stick to (since Redone/Fernando are confirmed): RedOne, Fernando, and Zedd.
Lead single can be a RedOne masterpiece (that's not a clone).
Create massive hype.
Second single be a RedOne follow up.
Third single should be a crafty Zedd single (to bring him to the forefront).
Fourth single be a Fernando single in the mold of TEOG.
Maybe. IDK.
