Quote Originally Posted by Arkine View Post
Size 5: Reserved for Relic/Emp shields, they blocked almost all the time and most of the damage, they were almost impossible to get without dedicated shells helping their PLDs, and took 6months+ of dedicated work to get. (Aegis etc)
Just an aside:

The Relic and Empyrean shields are separate size classes. Aegis was a Size 5 with a greater block rate and damage reduction than the others. Ochain is a Size 6 with a 99% Block Rate (100% depending on mob level and shield skill).