Although Exile is a tad expensive, it is very rewarding and is one of the best options for many Paladin builds. In particular, it is by far the best shield for increasing physical defenses due to in large part to its inherent Defiance aura.
Exile is especially effective on an Ethereal Shield, as the runeword allows the item to repair itself over time. The only thing that is lacking with this shield is any sort of resistance, so it's best to create it in a base that has good resist bonus.
15% Chance To Cast Level 5 Life Tap On Striking
Level 13-16 Defiance Aura When Equipped
+2 To Offensive Auras (Paladin Only)
+30% Faster Block Rate
+220-260% Enhanced Defense (varies)
Replenish Life +7
+5% To Maximum Cold Resist
+5% To Maximum Fire Resist
25% Better Chance Of Getting Magic Items
Repairs 1 Durability in 4 Seconds