It is considered an excellent choice, being useful to all ardents due to the scaling mechanic. In general, the augment 1 and augment 2 options can remain useful during your career, but there's a potential for them to get displaced by other healing sources.[Charop Ardent] Of note, character builder incorrectly listed the unaugmented power as having the healing keyword. As it is not the case, the unaugmented power does not work with Mark of Healing.