The boss Marik can be attacked only from a little distance. He heals himself going in his forge when his life goes under the half but after some full life recharge the forge "dies" and he cant heals himself anymore. He is an easy kill in solo with a necro (Mordred)in solo. He is orange if you are alone and he cant go out of his forge room. For me at level 39 he dropped some silvers(60 or so) 60 aurulite fragments and nice tank gauntlets lev 42 qual 99 with some over cap for strength and hp, bonus in strenght and all weapon skills and a damage proc.