I must say, the tedious bounty is well worth it. Thorn is an absolute monster in PvP and when you get the DoT upgrade, no one stands in your way. I never thought I'd be a hand cannon guy, but thanks to thorn, its all I use. Also, if you're having trouble with the void damage kills, try finding a void sniper and use that and hang back sniping people, I did this part of the bounty in about 7-8 matches.