Naxot spawns along north wall closer to the Chardok area.
Ixilblat spawns far away in the southwest corner, at the coordinates provided above. I believe he moves slowly northward, eventually exiting the zone into Skyfire.
I didn't want to take a chance at missing him since I don't know how long he's up. I left cleric with Naxot and moved rest of group to a little north of his spawn spot.
Did the turn-in and then summoned the cleric using Call of the Hero.
I did this with some trepidation since CoH clears aggro and I was a little fearful it could affect how the quest operates. This was particularly disconcerting since Ixi didn't show up on druid track and we were pretty close.
But the tank saw him and we engaged.
I remember needing a decent raid force to kill this guy back "in the day." But these days, even on a TLP server, in this case Agnarr, gear is so good that the fight was essentially trivial. Engaged with sk, dru, mag, cle and enc, all level 65, mostly partially Time-geared. The decision was never in doubt, although did have to Complete Heal the tank once. Even fire nukes landed, surprisingly.
On to Chardok to call upon the King!