For the snake boss in Gundrak just park your team on the stair case and the poison nova wont hit them, i pull him into the door way- balls to the wall dps i drop my fire elementals when the adds come and they take care of them. Up until now this boss and the first 2 bosses in HoL were the only 3 i could do on heroic. now that my badges have added up and have 3 titansteel guardians (working on the 4th) i can do all of UK and then some. id say just find an easy boss you can do and just farm him everyday. it will all add up along with the rep and then it will be cake. as far as rep is concerned i chose knights of the ebon blade first for the pants, 104 spelldmg with a socket, and a spellthread, plus theres a nice cloth belt which helps