User blog comment:Fistful of Force/Cast heals early, not late./@comment-76.103.140.128-20120613184157

I'd say the hardest person to time heals on is Karma, considering her heal is based on a % of missing health, along with if she's taking damage in the fray, her heal and shield will get stronger the lower hp she has.

Oh, and the factor that she can only heal when mantra is used.