That's a valid strategy.
Going for the woman that most attracts you first is also a valid strategy. If you do that it's important to win the friends over pretty quickly.
It's about being socially calibrated. You don't want to alienate her friends. Because she's known them longer than she has you.
Part of your friend's strategy is not putting women on a pedestal. Standing out from most guys in the right kind of way.
The main thing is that you are going out and breaking the ice with women. And that you speak and interact with them in the right kind of way. You don't need to be perfect, but there are certain principles regarding what you say and how you say it that will increase how attracted women are to you. It sounds like your friend already understands these principles.
In the context of a girl with a group you will have to do some problem solving. EG they were planning on going home together.