What to do when you are surrounded by sickly pretty girls?

Looking at the heroines on the system list, Tianxue fell into deep thought:
"What exactly is this app ranked based on...danger level? Or difficulty of strategy?"
Friend No. 1:?
Friend No. 2:?
Friend No. 3: Genius Girl + Kidnapper
Friend No. 4: Gangster Boss (Female)
Friend No. 5: Exhibitionist (female)
Friend No. 6: Subway Wolf (female)
Friend No. 7: Stalker Girl + Senior Girl Control
PS: This book is also known as "Bad Girl APP", "Why is there always something wrong with my lover", "The black lady with long straight hair who always fails in love", "On the self-cultivation of bad girls", and "The loser black lady with long straight hair will never be conquered"