The only eru specific item you might grab in your mid 30's is the Helm of Ridossan for the easy reclaim energy clicky. You have to wear it but easier/cheaper than the mage quest one.
The Muglwump (and warrens in general) has a trivial-loot code so if you dont get any xp off the mob you cant get the proper loot off it. Mug is lvl 25 but I would spend a few hrs invising down and smashing it solo until you get the drop.
https://wiki.project1999.com/Helm_of_Ridossan