I'd say you actually need both. To stay with sherman's comparison, what if it's 200 6th graders? They will get you. if they just start moving towards a wall with you inbetween them and the wall, you lose.
Of course, the better quality soldiers you have, the less you soldiers you need and vica versa.
Of course, the better quality soldiers you have, the less you soldiers you need and vica versa.