Allanon's BB is nice as well since it offers 15% elemental mitigation for three turns for all six elements. Compare it to Iris and Drevas, who only do 2 elements for 10% for 2 turns, and Reihard who does 4 elements for 10% for 1 turn.
This elemental mitigation multiplicatively stacks with normal mitigation, similiar to how UBB mitigation stacks.
50% mitigation + 15% elemental really gives 57.5% total mitigation (so 10% really gives 55% total mitigation). This is why Reihard isn't really that amazing when she was released.
XI Wiki


