Mundane attacks with a high enough DV will work "fine" on Force 4 on down. Force 5 or 6, still leak a bit through. Force 7+ you'll occasionally do a box. Force 9+, nope, just nope.
You want to handle spirits, play an Adept with a Weapon Focus or Killing Hands.
And please note, high DV isn't the most mechanically effective. I was answering the "...raw DV..." question.
IMO most effective is likely a Metahuman burn out Adept with +4 Agility from Muscle Toner, Bone Augmentation, maxed out Close Combat skill, and PP spent on Increased Reflexes, Killing Hands, and Critical Strike. You can hit... 8? DV with Martial Arts and such with an Unarmed attack. (Iron Hands, Kick, Flying Kick...) And you can go anywhere with this, and punch out Immunity to Normal Weapons, and get a high dice pool to increase your DV. And keep adding levels of Critical Strike as you advance.
But then I value "go anywhere" over a few points of raw DV, as long as you're still able to one shot a majority of opponents. And Adepts eventually win at raw DV because of Critical Strike, just takes a while.
Attributes A, Resources/Metatype B/C (whichever), Magic D, Skills E. Elf is my personal preference for the Agility, but really anything but a human for the higher Metahuman Priority.