(standing over a defeated Garble [aka the other team's Heavy]): "Dominated, you red menace!"
or "You were loud and ugly and now you're dead! Amen!"
or "I joined this team just to kill you and maggots LIKE you! Well, that and the fact that all my closest friends are ALSO on this team, but that's another matter entirely."
or "Friendship and magic PLUS muscle and fire beats muscle and fire alone! Look it up!"
(embarrassed grin) Sorry. Couldn't resist. (even more embarrassed grin) I also couldn't resist modifying a couple of the Soldier's domination lines (one of them Heavy-specific) to make more sense for the fandom fusion.