PkHonor

All individiual stats are already shown, this is just a quick explination of what the spirit shields are and what they do. They are designed as PvM and PvP tanking shields and will signifigantly increase the suitability rate and duration of your activities.

The divine spirit shield boasts the greatest tanking potential at 20% damage reduction at the cost of prayer points, the amount drained is equal to the damage that was prevented.
eg. You're hit 100 before damage is calculated, divine saves you 20 life points so you're hit for 80. The 20 life points saved are taken from your prayer points.

The Elysian spirit shield is the second most powerful for tanking in the game however being used in extended PvM scenarios it comes out ahead of the divine due to it not consuming prayer points. 25% damage reduction 70% of the time providing an average of 17.5% damage reduction. keep in mind that RNG plays a huge factor in your suitability here as there is no guarantee that it will soak the damage of a large hit as opposed to a small hit.

Arcane spirit shield has the highest mage offencive bonus of any shield in the game.

Spectral has the highest mage DEFENSE in the game of any shield.