Lycoris it isbecause astro is not a whitemage. They are not played like a white mage. Since aspected benefic is a burstish regen its basically ahalf potency benefic with a regen you can use it to supplement the aoe healing by having rolling hots and spot healing. An astro is meant to assist the group in anyway, by a player by player basis . Based on the cards you have every card is usedin some situation and spot healing ismore MP efficient than spamming a lower potency Medica.