"Eldrig the Old in Skyfire Mountains has a spawn spot of loc (pos 500, neg 4000). Eldrig is a named Chromodrac, level 51. He summons, dispells (a LOT), melees and cast Boiling Blood DoT, which he will proceed to dispell right away.
Go north from the OT zone until you hit the spot. Every 13 minutes a mob will spawn, and start walking towards OT. If nothing is spawning, you must track down the placeholder and kill it before the spot will start re-spawning. The placeholder has been reported to be any mob: bottomless feasters, skyash/skycinder drakes, wurms, mature wurms, wyverns, and chromodracs. Thanks to the bards on the Concert Hall who have figured this spawn spot out.
Once this is accomplished, and you found the PH, and the spawn spot is spawning, Eldrig will spawn regularly. I am not positive that this is the only spawn spot of Eldrig. I have seen him up once, and he walks a path from this spot to the Burning Woods zone and back. Bards on my server who has followed my directions here has communicated with me, and has eventually gotten Eldrig to spawn. Another bard reported to me that he saw Eldrig fly back and forth between approximately (neg 3250, pos 2000) and (neg 3250, pos 1000). This is right near the BW zone. So, I suspect, once he spawns in the above location, this becomes his pathing.
When I finally found him up, my group fear kited him. I played my fear song, and fear song only. He went down quickly. We had 2 bards (levels 51 and 53), 53 warrior, 53 cleric, and 57 druid. Second time I found him, we just snared him, and no fear, full group, no problem. We killed him at his spawn spot the first time, and near the Burning Woods zone the second time, as he wandered down.
A trick level 56+ bards can use, is to use the Song of Highsun to gate mobs back to the spawn point. "
Source:
http://www.geocities.ws/legacysheroz/bardepic.htm
Always look for geocities guides, because nobody used that shit after 2001, so you can be reasonably sure it's near-classic info.