Might have a problem with the Snuffers at 45 pounds. The Woodsman is lower profile and might do a better job of penetration. If it was my choice, I'd look at using Magnus Stingers or Bear Razorhead Lites with the accessory bleeder blades. Try and stick within 25 yards on your shots and put the arrow where it needs to be.

Feathers, I wouldn't go any bigger than 5". You won't need those big magnum jobbies with the Terminators. With the Stingers and Razorhead Lites, you could probably even do 4". Not sure about the Woodsman heads tho...