I used to run just Felwinters on a max agility Bladedancer on 10 sensitivity. While that's the best sensitivity to shotgun on your primary game tends to be ass if you're using anything but a Hand Cannon. Even then, your primary game isn't the best. When HoW came out, I started using a sniper. I saw what people could just pull out of their ass when they snipe, it seemed like an art. I learned that all the best snipers played on a low sensitivity and it made my sniper shot so much better, and even improved my primary. Now I snipe on 3 and shotty on 4.