Arx Mentis, with its 3D maze can be quite a pain to navigate, however, this is one of most reliable zones to get waypoints (and Finds) to work.
With the exception of Numicia, who roams on the ground floor near to the ZI, all the nameds can be waypointed from each other.
Bonemaw /waypoint 181, 316, 116
Caldarius /waypoint 86, -294, 85
Mayor Praetor Livio /waypoint 13, -160, 177
Mother Virgia /waypoint 120, 142, 120
Principal Indagator Gordianus (roam) /waypoint 125, 184, 4
Principal Indagatrix Lucia /waypoint -187, 20, 177
Principal Quastori Numicia (roam) /waypoint 21, 33, -479
Principal Vicarum Nonia (roam) /waypoint 72, -9, 177
The Codex Libre /waypoint 45, 8, 85
Praetor Loricus the Hollow (heroic) /waypoint 183, -55, 85
Portal /waypoint 0,0,0
Protarx gardens /waypoint 242, -205, -30
Tip: From the portal, most of the waypoint routes take you south past several brooms and books. If you want a more relaxing route to most destinations, follow the east passage down to the Protarx gardens, then do the waypoint.
Edited, May 6th 2023 5:34am by Chardlb