In our system if they code en route we will pull over to have that extra set of hands and if need be we will drop a king if we have time. Normally its just an OPA or NPA and a bag.
It does not matter what the score was the most important thing is that you passed. Try not to stress on scores because then you will always make small mistakes. Just be confident and you got it.
They taught us to kind of check all three at once for unresponsive. Look Listen Feel type thing. I know I am not a seasoned EMT but it does make sense to do all at once. I may be wrong and correct me if I am but it sounds like it works.