"Soft-path" refers to the style in which this type of man goes for his girl. The Soft-Path Soldier travels down the weakest and most candy-assed path that he could possibly take to get with a girl.
"Oh he's been my friend for a long time."
"Does he like you?"
"Yeah, he's my Soft-Path Soldier, but don't worry that kind of shit doesn't work with me"