* Remove Shield from hotbar. Give it permanent Shield.
* Use the slot for
** Heroic: Stoneskin or Protection from Elements, Mass
** Epic: some unyielding sentinel SLA, either Divine Energy Resistance or Resurrection

* Consider giving the hire Arcane Barrier (EK tier 3 ability)
* Can the epic version get Renewal, again from Unyielding Sentinel, as an ability that it would occasionally cast on allies?