lvl 8 - 20 = troll
lvl 20 - 33 or 50 = Edron Forgotten Tomb or Mother of Scarabs Lair
lvl 33 or 50 - 80 = Edron Earth Elemental or Liberty Bay Quara Scouts
lvl 80 - 160 = Hidden Crystal Spiders or Oramond Southern Plains or Zao Temple Complex Mutateds
lvl 160 - 300 = Lower Rathleton Golems or Zao Hidden Lizards or Forbidden Lands or Nimo - Hive Surface + Towers or Eldar - Hive Surface
lvl 300 - Delete = Hive East Tower or Roxzin Hardcore Deeplings or Vengoth North or Oramond Tower or Oramond West or Yalahar Grim Reapers or Hardcore Banuta or Garkstal - Hive West Tower
I would do a ms like that.