Tried it as Sniper at 47, unbeatable. Went to Corellia, leveled up a bit. Came back at 49, still unbeatable. Found a friend.
This was the only soloable enemy that I couldn't beat solo.
Pretty much the same for me. The funny this is, with two people he goes down like a wet paper bag.
Voss was a stupidly hard planet to solo on though.