Plane of Tactics guide

Vallon Zek advice
This mob does not appear to have any specific resistances or weaknesses. One spell that I found to be particularly effective if the raid takes on all 5 Vallon Zeks at the same time is Color Cloud which does appear to land quite effectively. However, Color Slant does not work for some reason so it is not possible to alternate between the 2 spells to keep all the Vallon Zeks continuously stunned.