an engi with the FJ/SC/GS can literally shutdown a demo/medic combo with little to no risk. the gunslinger currently has a "feature" that allows you to store the third punch in a combo by holding down attack2, the short circuit can delete the demo's stickys and pipes, if the medic tries to ubersaw, just critpunch him and w+m1 the demo. or you know, destroy your sentry and crits the demo.
