The Division 2 Iron Horse Boss 2(easy)
This is how we do Fieser and this is easy. We have been asked many times how we dont need anyone upstairs, and a lot of teams still have someone running around in the furnace tanking Fieser, if there is someone in the furnace then you need someone upstairs to stop the adds turning the power off, the codes need to be done quick also, if your slow with the codes the adds will turn the power off for the control room so your team needs to be efficent with the codes.
From the moment the 1st box is shot one of us runs a timer for 2 mins, this is normally myself Dan or Freeze, (both Dan and freeze are awol at the moment and doing irl things) because the rocket phase is every 2 mins from the moment the 1st box is shot and knowing this enables you to be ready in the airlock to fire the rockets, and by the time the 1st rocket phase is done there should only be 1 code left to do.
Another thing to be mindful of is the stairs on C and B, one of the boxes on B is upstairs on A side and you need to stay away from the stairs so shoot the box from downstairs, there is no need to go up stairs, this can cause the adds to turn off the power, you can shoot the chungha's and adds from downstairs. I would say that we are successful using this method 99% of the time and it is very rare that the power gets turned off, I will say that if your playing open doors this can cause lots of wierd things to happen, we have had the power turned off at 100% while moving the crucible over the cannon and pouring lava.
If the power does go off back C and 1 player from B can go and resume the power to the control room.
Having nobody upstairs other than the control room player and nobody in the furnace means you can be more efficent with codes and add control and after the 2nd code is called and checked we put someone in B to damage the boss down to 4 bars of armor, if you do more damage he will run to the cannon and heal himself back to full armor. we do Rockets from A and C and when it is time to go in to the furnace Fieser may run to the cannon to fart so be mindful of his movement when you enter the furnace, nobody can survive his explosion, you will die if you in there, we also send players from B to C airlock with the players from C they will enter the airlock while the water is be squirted on to the cannon and they will kill Fieser while the players that was on A will stay out and clear the adds that are left.
A bit of practise is all that is needed for this method and you will soon become proficent taking on Fieser and with experience you will know exactly what to do if something goes wrong.