Re: Group lock
There are too many variables to provide that information. The goal is just to verify Harry's there, which means there should be no altercation, but that cannot be guaranteed. Additionally, Jason will try to ensure the League doesn't know the identity of the person entering the level with me, but there's the potential the League will know about it regardless. There's the potential of being trapped in RyCorp or being caught by their security. There's the potential of being caught by overall building security. Someone super stealthy would do best.
Ergo, the danger level could be as low as 1 and as high as 10, given your chosen scale.