I am lvl 58 and have been hunting in GE for AA's for a week or so and these mobs con white or dark blue to me. So they can be lvl 58 as well as lvl 57. Not to hard a mob.
Not hard at all, just time consuming, 1: he could have rooted it and used arrows, 2: with today's twink gear, and the ranger epic being attainable as soon as you're high enough for the npc to talk to you (earthcaller = 50 % slow).....