Personally, I just get ARP bolts and follow the directions. Harder to mess up, IMO.
I did see an interesting video where a guy measured the clamping force with torque to yield and he showed that once it yields the force stays constant for a long while until it falls off a cliff or breaks. Meaning if it yields at 45 degrees, it doesn't matter if you continue cranking in the other X degrees called for in the spec or not. The force is the same. You can see why they just call for some large value where a bolt should yield but not break (should being the key word).