So far all of the ones i have seen are lvl 51, there are much larger ones called "a nightstalker" who were yellow at 58, and summoned. Spawned when someone went by doing quest protecting monk
All of these that I have seen are Level 51. I have been able to charm all of them, and Bard charm does not work on mobs level 52+ (until you get the lvl 64 Charm).
So unless there is another camp of these guys below the ridge they are all level 51.
Tenter OneDrum Troubadour of the 55th Dirty Ditty Agema of Ayonae Ro
Some of these guys con even at 51. I was lucky enough to be able to join a 61 druid with a charmed Blood Raven and we took out 6 or 7 of these before LD put a halt to the fun. 10K HP or there abouts.
Blood Raven was yellow BTW and ripped these guys apart.
all i have killed have been dark blue to me at lvl 57, so the listing of 59 60 is defenetly off. have had people in the group say even at 55 though. just my 2cp
STYHL MEATSHIELD 57 warrior of the tribunal vazalle