Fair point to bring up about Feb Bank.
Fed Bank should be high risk high reward.
Once fed bank alarm goes off all police need to respond, to stop the robbery.
One of the cartels can respond as well, but they MUST NOT enter the Fed Bank during the robbery as they will be shot by police. The cartel should sit back and wait and see of the police retake the Fed Bank or fail. Then the cartel can try and stop then rebels or take up the fight outside the Fed Bank Walls, like at gold buyer or other surrounding areas to stop the rebels reaching an outpost.
The police and cartel are not working together during a Fed Bank robbery, police can kill cartel members if they get to close to the area. And cartel can kill police if the police go after them. " If Federal Bank or Sydney Bank gets robbed cartels can engage the rebels robbing the Federal or Sydney bank, but they can not rob the Federal or Sydney bank out right, if the vault is intact they must leave the vault intact, and let the police lock the federal bank backup. But cartel members can pick up gold off dead rebels." meaning cartels can not take gold out of the Fed Bank, they can only take it off the dead rebels, they must let the police lock up and secure the Fed Bank. Cartels can engage rebels robbing the fed bank, but must let the police handle the situation first, then they can respond outside of bank areas.
Main goal is for the police to stop the robbery and arrest the robbers.
Main goal for the cartels is to kill the robbers and take back what is theirs.
Main goal for the robbers its to get the gold/cash and get away alive.
Thus needing anyone to refine the tactics and manpower in a robbery.