What kind of escort helos were they using for the Blackhawks - other Blackhawks or Apaches? Were the escort helos already on station or did they launch with casevac?
Not sure that it is realistic to have rotors turning after 5 lines - they still need a mission brief and need to know what equipment to have on board.
They do have lots of great kit but the mission risk level determines the approvals required for launch this results from assessment of ground activity, security level at HLS , do other ops with higher priority for casevac, patient census level and Operating Room status at closest treatment facility.
Realistic scenarios would allow some prep work before launching high priority assets.