Easy as cake to solo as a 42 chanter - charm Manti, alacrity, sic em! Root and slow FG Savage, 2 min later dead FG. Even easier with my 32 druid friend with snare, we fear kite em with manti's almost non stop
These are Soloable to a LVL 43 wiz all though i would wait to 44 as it will be more mana efficent. at 43 it took a Full bar of Mana to Down one, Had to Cast Bonds of Force on it Twice :) and the Loot is not all that great. Xp at 43 was allmost 1/2 of a Blue Bubble.
These are very tough, loot sucks (unless you are going for prayer shall quest) and take way to much mana for the xp. I'm a 41st level Druid (and, no not twinked -- 145 wisdom).