soloed him today for curiosity...hits for 600 on a 70 pal 1900 ac, 10.5k hp had to actually heal during fight but outcome was never in doubt ...dropped these arms...which rotted ...not enough people left on server to care.....MERGE SOON YOU MORONS...
Has more then 12k (my 1400dmg druid nuke took him from 17% to 13%HP) so i would say its more like 25k - 35k range. He also summons and max hits for 451. He spawns after you kill Broon which sometimes spawns Droon and sometimes Fabled Proon. These two spawnable mobs spawn in the upper left part of the EK map.
Proon was blue to a lvl 52, had about 12k hp, max hit for 451, immune to snare root and stun, and summons. Triggered off the normal broon/droon/proon cycle