No, you don't... take it from someone who's BTDT, the current adjustable 2-point slings (VTAC, VCAS, etc) are much simpler, more comfortable, and allow easy cross-shoulder transitions.
Three-point slings are soooooo 1998.
I have a cheap three point right now but I am looking at getting an adjustable 2-point that could be used as a 1 point also.
Where should I look? I will be using this on an ak with wood stock.