[skill]Assassin's Promise[/skill][skill]Glyph of Sacrifice[/skill][skill]Meteor Shower[/skill][skill]Searing Heat[/skill][skill]Breath of Fire[/skill][skill]"Finish Him!"[/skill][skill]Fire Attunement[/skill]
There ya go. You can murder a mob in ~5-10 seconds yourself

And murder the next mob without any downtime

For heroes I'd take 2 Paragons with [skill]Defensive Anthem[/skill][skill]"Stand Your Ground!"[/skill] and Spear skills for some defense and damage to finish off stragglers, and then an MM cause you never go anywhere without one if there are bountiful corpses.