As a Hunter with no native Void attack modes, the first time I ran the Thorn bounty, I camped Control with a void MG and either a void fusion rifle or sniper. It took me a few days. After winning Atheon's Airsoft Rifle, I knocked out my second Thorn bounty in about a day. I really don't give that stupid AR enough credit. It's good for two things: Void burn Nightfall strikes, and the Void Damage section of the Thorn bounty. I don't even use it in the VoG anymore. If I need to kill Oracles, I'll use Super Good Advice (at least until Bungie patches the "disappearing heavy ammo on spawn" glitch).