Truly the Buffammo is a friend to all gungeoneers and desires only to assist our runs.
Guide to Fight Against The Buffammo
Useful Tips for All Phases
The Buffammo is a simple boss and his attacks are only dangerous when you don't expect them. Below is a list of his phases and what to do to maximize your chances of not taking a hit from them.
The best tip is to stay on the opposite floor of him at all times, He went to the gym with the Gatling Gull and he did NOT skip leg day, He can sprint into you costing mastery in an instant and its hard to notice in time. In addition many of his attacks will completely miss you if he is on the opposite floor.
Floor Switch Phase
When you notice he is about to jump there are 2 ways to dodge, Top floor dodge and bottom floor dodge. When on the top floor you want to be as much in the center as possible that way as the bullets are about to hit you you can drop down and land in the center rather than landing on one of the two side platforms. When on the bottom floor you want to jump up to your side platform and wait for the bullets to get close then jump to the center of the top platform.
After jumping he will usually charge into the walls either 1 or 3 times, This will drop rocks from above that you need to dodge, Simply stand between the hazard signs to ensure you don't get hit or if possible stay as far away as possible. In addition if you are on the same floor as him when he goes to charge do everything you can to move off that floor.
Buffammo will chuck explosive milk jugs at you which explode into slow moving projectiles simply maneuver through them slowly and roll only if you have to.
Shot Volley Phase
When he shoots his bullets will hit the wall behind you, you want to stay as far as possible from them without standing directly above or below Buffammo to avoid getting jumped on.
Using all these tips you should easily be able to secure your mastery every time.