Master Cylinder and Servo is different right bro.:love:
Master Cylinder provides pressure and servo reduces effort but there is still a maximum contact between the pads and disc rotor, so upgrading them to bigger rotor can provide more contact surface while high performance brake pads provide higher friction(miu).
oh my..pardon my typo..lol..but in what aspects do you want to improve braking ? the common methods have already been mentioned. other than that..it's bigger brakes, etc.