I've been using this build to get through Archon fights and steel path.
The main abilities you'll use are to push out your Prismatic Gem, and keep spamming your first ability Fracture blast to keep energy/health orbs flowing for your healing passive and energy for the team.

Keep an eye on your team and use your Preserving shell when people start to struggle or get low to keep them up and finally use the Crystallise for crowd control if you start to get overwhelmed.

I'm hoping to get primed flow in the near future to make this even stronger. Still playing with archon shard add-ons to see what helps most.