You've forgotten about Conkeldurr's Special Defence drop on the Extrasensory calculations as well as Iron Fist and one of STAB/Life Orb/Crit on Drain Punch, resulting in 5 more damage and what should be 10.25 total healing. And apparently I forgot about Trick Room
"Just keep at it Puncha, this menace will be brought down soon enough."
Conkeldurr: Payback - Fire Punch - Payback
IF Payback is imprisoned THEN replace all instances with Hammer Arm
IF Bronzong is holding a Life Orb THEN Knock Off
IF you are asleep THEN Sleep Talk (Fire Punch, Payback, Knock Off, Thunder Punch)

"Just keep at it Puncha, this menace will be brought down soon enough."
Conkeldurr: Payback - Fire Punch - Payback
IF Payback is imprisoned THEN replace all instances with Hammer Arm
IF Bronzong is holding a Life Orb THEN Knock Off
IF you are asleep THEN Sleep Talk (Fire Punch, Payback, Knock Off, Thunder Punch)