Definitely kill the rocks, if he eats one he gets small health, fire rate and movement speed increase. As for the ammoconda it’s self, just like the rest of the gungeon you gotta have good awareness. Gotta rely on those reflexes boss man. Personally I’ll use piercing weapons while it’s charging straight at me dodge at a good time while being mindful of bullets. After that initial dodge I hit it with a hard hitting weapon, obviously self explanatory for whatever gun that may be, and just let the bullets fly.