I've recently got back into playing Diablo 2 LoD and I've been enjoying it way too much. I've already got a level 37 frenzy Barb and a level 18 Trapsin but I haven't been able to get a good Merc that is reliable. On my Barb my Merc constantly heals and levels up really fast but I pushed my Trapsin to Nightmare to get the Act II cold aura Merc. Since I've got him he repetitively dies and under performs, I play along side another player and his Merc never dies, always on top hp and is the same level as mine. I don't know if it's right but my cold NM Merc has 40 hp as a level 15 and insta dies vs Normal Act II sewers. Can I get some help on why this happens.