From a PUAs point of view, what is the ideal number for a guy?

I tested this as an opener, and got some interesting feedback. Most of the girls answers were around 5 to 10 women tops, more than that and they would feel uncomfortable around the guy and dump him. So it got me thinking, what is the PUAs ideal number of women in a life time?

Looking forward to hear your opinions, peace!

P.S. Sorry for my bad English, I'm still working on it.