First, understand that I had not used this zone. With internal map, started with the team challenge, parking the Beastlord in Tranquility at the zone to Air. Zoned in with 100 Ranger and tank mercenary. Made waste of the entry area mobs moved to the early part of the tunnel, camped out, and brought Beastlord to same place and camped out the Beastlord. Reentered the Ranger and explored the tunnel, tracked Spiritfrenzied Phoenix to an area which I did not know how to get to with previous advice that the phoenix area was three clusters straight in. Gated Ranger and Beastlord out.
Located a mirrored copy of EQ Atlas map of the zone, loving the simple drawings, making it easy to see zone pathways. Applied the location given for Spiritfrenzied Phoenix neg 730, pos 600, pos 440. Pinpointed on the EQ Atlas map the only possible location of the phoenixes. Indeed it is three clusters in, not counting the entry area, but definitely not straight. Nothing is straight in this zone. For extra clarity, after clearing the entry area, head into the arched entry to the tunnel. From there you go on a ziz-zag path south-east to first cluster. You need to clear only the north east part of that open area. Exit east and proceed south to the next cluster. Here you need to clear only the eastern or western half of the cluster; this one with air elementals in it. Walk west to the next encounter. The third cluster is inhabited by phoenixes. It is necessary to clear only the south west corner. It was said elsewhere that the Spiritfrenzied Phoenix would not add. I found that to be false. It aggroed as I was clearing to make way for the Beastlord to do the one kill needed for the quest.
In proceeding through the zone, Ranger did the killing, camping out for the entry of the Beastlord to move to the last part of cleared area. There were four occasions when Ranger camped out to allow the Beastlord to move unthreatened to the new area. Since the Ranger could not avoid killing Spiritfrenzied Phoenix, I thought that there might be a 15 minute delay before Beastlord could loot needed clay. However, the corpse provided instant access to the Beastlord. Goal accomplished with alt team participation.