If we're currently in an "all in" situation for the remainder of AR's contract, you should probably look for a journeyman vet to be QB2 if the intent is to have some insurance if QB1 misses games. I don't know that Boyle or a draft pick can be counted on in that capacity.
It's fine to draft a guy in the mid to late rounds if the value is there. But I don't think you could count on that guy to win you some games while AR is out.