It is helpful to remove the enchantment Sliver Armor as soon as it is cast. These Elementalists like to come in close to the middle of the party due to the touch range of Star Burst. If many party members are near it, Sliver Armor will often kill the closest member, and sometimes even more than that due to their high level of Earth Magic. If there are no enchantment strips, it is best that nearby fragile players move back for the duration of the skill.
Shield of Absorption is an effective way of keeping someone alive if they are targeted by Sliver Armor.