Hello!
I think is better to pursue PSAs because you have more benefits..
CSA are good too if you don`t have enough time to help them, send them emails and explain them how to succed in SFi. In this case you have a hope that the other Co-Sponsor will explain them what they have to do...
I prefer to have more PSA and learn them in my style what they have to do..
Have a wonderful day!
