Maximum level should be 22. At 21 I was seeing orange cons at the broken bridge in sals. plains.
Also, it should be noted that you can NOT single pull the broken bridge skeletons while soloing. I assume they put in BAF to thwart smite clerics (and other soloing casters) who are forced to solo to solo elsewhere.
The skeletals located on a line near the fort only come in single when not grouped. You do have to watch them joining Centurions but most of the time you are safe pulling them w/ bolts or arrows. The roaming pairs do not ever argo nor does the roaming named. Just remember that if you are fighting a legion and a centurian walks by that you pulled from the line it might join. This happened only once to me...
I also found a Slash Dagger Quality 89 +2 slash and +2 stremgth and was better than my blood sword.
I also got some Bloodied Leather gloves had nice pluses in quickness, dex and strength...+3-+4's
I hunted the for one level so killed around 200 or so and recieved 1 89% thrust sword, 1 89% slash dagger, 1 set of leather gloves, bracer w/ +'s in int, dex amd 6 into hits. Not bad but I would say drops are rare so 1 in 50? Soloing these at lvl 21 was easy and I am a infltrator w/ yellow gear and weapons. I landed 2 poisons and pulled w/ xbow never used PA.