Casual tanking/support build with multiple layers of damage reduction for you, one layer of damage reduction for allies, defense through Mass Vitrify wall, healing through [Mending Splinters], Energy generation and [Shattered Storm] which spreads the splinter storm debuff (1.54x damage multiplier) as well as contributing to the heal rate of [Mending Splinters].

Use Fractured Blast (from [Citrine]) to get health orbs for enerrgy gain and stacking Arcane Blessing and [Health Conversion].
All the armor from [Health Conversion] and Arcane [Guardian] gives you health damage reduction but also contributes to the health of Mass Vitrify.

Personal Tanking:
Splinter storm Damage reduction: 90%
[Adaptation] Damage Reduction: 90%
Arcane [Guardian] + [Health Conversion] gives 2440 armor for total DR: 89.1%
Total DR to health: 99.89%
Max eHP with Arcane Blessing: 1,418,200

Healing rate: 29 health/s per enemy. With 10 targets affected, everyone receives 290 health per second healing.

Flexible Slots
Both Augments and Adaptation flexible for:
Range - [Stretch] and [Augur Reach]
[Natural Talent]