Glory of the Hero - tips'n'tricks

[Multibocks]

Seriously!

For me, I need some help: The first boss in OK I cannot get that achievement. I tried dropping two earth elementals and going to town on the boss in another room. Soon as the adds spawn he goes immune so I figure Im not far enough away, can someone describe where I should tank him at? I'm best with pictures =)

edit: also another one thats a problem is Intense Cold. I cant cleanse all 5 of use before it stacks to 3 on the debuff. What I am wondering is: Since this is an individual achievement (one person can get it while rest of group fails to stop stack): Can I just leave one of my shaman outside of the area where you fight her and avoid the AE for the achievement? That way it will just take 5 days of rotating everyone (obviously tank has to stay and cleanse himself) Anyone know for sure? Watch I bet the AE is zone wide. /cry