A broadhead with a high penetration ratio, narrow blades and with the blades lined up correctly is not likely to steer an arrow. Broadheads with multiple blades will increase the chances of blood vessels being hit. More blades will also increase cutting in the capulary system and cause more bleeding. The more internal bleeding our arrow and broadhead combination causes the better. The arrow must not be dominated by the broadhead.
Balance is the key to good flying, accurate arrows.