No Hope Moss dropped from a Warrior, tho I think it could rare drop from any of them. The moss is used by Rogues for high level Make Poison for the Grandmaster Assassin's Seal.
Was in the swamp last night medding with my lvl 24 necro and got jumped by one, conned yellow on me so must range to Lvl 25, and hit me for a max of 40. Both me and pet were both down on health. Fiegn death failed and you guessed it "Please wait loading" So if you see a Gaz Warrior, make sure you con it before jumping on one.
I ran into one of these guys in the newbie zone in SoNH. They hit for about 22dmg and they can stun you. I wouldn't try taking them if they are yellow to you.