Aside from Max Percentile where AST is in second place, AST is at the bottom for rDPS at 99th and below. They also have significantly fewer parses than the other 3 healers, as it appears that despite ASTs strength in a raid setting, the absolute horrendous state the job is currently in keeps most players off of it. AST is slated for "major adjustments" in 6.2, which will hopefully address button bloat and maybe even address issues with the card system.