Aurora had spent five months there in the Demented Grounds, so she didn't just practice alchemy. The concentration of profound energy was too high and it would be a waste not using it.
In origin Profound Stage, the practitioner had to fill up the origin core with good quality profound energy and slowly expand its capacity.
In Demented Grounds, the quality of profound energy was of the perfect quality and was in abundance.
So advancing quickly in stages was very easygoing for Aurora who had top quality profound veins.
And some may wonder that with how fast she was progressing, her foundation may become unstable.
But it wasn't really the case as Aurora was constantly pushing herself in those five months. She would practice alchemy which would test her control over profound energy and elements.
