I use a mixture of talents. Reading the situation, I can tell when we're pushing against the enemy and when the enemy is pushing us back. Depending on the situation, I will hang back and snipe or hide up in the rafters with a Vex Mythoclast. If they're charging, I might hide behind a crate with a shotgun and one plug. However, if we're in the lead I leeroy like nobody's business to push the lead. If I take two or three before I die, successful death.
So how about you?