It's not about damage that it does. With a grenade such as Arcbolt or really any other grenade, you prime them for the kill or finish them off. Once the grenade connects you have a limited window of opportunity to get the kill otherwise you've wasted a grenade and they've healed. Easy bake oven nades allows you a [i]massive[/i] window of opportunity where the person hit has no options other than to run and hope you can't aim.