While the proc rate outside of Abyssea is...eh... it's still nice to have. Inside, if you absolutely must focus on survival or are low manning something (or you feel you have a somewhat incompetant healer), you can stack your full +2 set with Atma of the Aquatic Ardor, Atma of the Savior and an elemental sachet depending on what you're fighting.

I personally don't have Atma of the Savior, but just with the rest, it's very noticeable. Absorbing a Blizzaga IV off Isgebind or a Terra Wing off Dragua is nice.

If you have Almace/Ochain, this puts you into a literal Invulnerability mode as you aren't taking squat from physical attacks and you have a very fair chance to absorb whatever magic damage comes your way.

In larger groups, you can get away with damage atmas, but if you plan on low manning or solo'ing, this is a great survival set.