I actually use Awareness quite often. I use it with the belief that is not meant to be a damage mitigation ability, but instead it is a damage normalization ability specific to helping the healers prioritize as well as save MP.

For example, there are fights where the rest of the raid is taking damage and the healers are now split between the tanks and the dps for healing. I will pop Awareness so that the damage I take is consistent and less spikey. Healers can then make a more accurate judgement on when to heal me vs the dps that need to be healed.

If I know a fight won't have intense healing moments for multiple people, I will pop Awareness on CD just to help save MP.