They owned the top floors of the Mandalay Bay, called the Four Seasons. It had private elevator access. It was often used for private visits by Gulf
bigwigs.
It has been theorized that the guns in Paddock’s room were to be used for an assault on that part of the hotel, to take out someone of importance.
However, the alphabet agencies intervened; but they were unable to stop
everything.
The rest of the attacks on Vegas were in addition to that attack, but also a cover.
More plausible now that we see this big shake up
The “The Siege”, about the attack on the Mumbai hotel, is descriptive of how these attacks go down. They are planned to have many diversionary attacks throughout the city, to confuse the police as to what the focus of the attack is and where to send response forces.
If one part of the attack does not come off, then those attackers who remain are to improvise and do the best they can.
These kinds of attacks are meticulously planned and carried out.