The following locations are targetable bits of the world (nothing there, just targetable):
16.89 -5.75 -430.24
54.23 -6.06 -580.81
17.83 -6.06 -653.37
-64.35 -6.11 -498.95
-78.95 -6.12 -756.06
17.04 -6.02 -878.41
Also, Advisor Vrizsril has a LOT of hitpoints for a solo version of a zone. He seems well suited for a solo encounter as far as being able to hit / being hit (I did 5.9M DPS per ACT and he did 120kDPS). I've finished both adventure (I'm a Paladin fwiw) and TS (Jeweler) timelines as well as gotten a smattering of upgrades from the solo/advanced solo zones) but his >3M hitpoints made for an almost 9 minute fight (thank goodness for my merc with Verdict to put an end to it). If this intentional, then so be it, but it's a very painful end to this (actually quite awesome) quest line