Some close calls. I especially enjoyed my on the fly strat to get by the falling blocks on the way back. The very last Iron Knuckle also tried to pull tactics. Helmethead could and should have been much faster but I played it safe.
Heatman's supercharged blast is required to get by Sniper Joe in the narrow passageway without taking damage. It goes without saying that Clashman's weapon is required to defeat the boss.
Otherwise, this is as close as you can get to using the Plasma Cannon without getting hit.