Which set is better for Trozan Sky Shard overall? Iskandra set, Allaghast set or Trozan's starkeeper set

Grim Dawn Gameplay Discussion
1

For comparing the three trozan sets in terms of overall damage, survivability and support, if a player was playing a Druid that specialized in Elemental or Aether Trozan.

2

Use Trozan starkeeper with regen as sustain (2 gollus rings).