in my opinion this is farm from useless.....AoE sleep blows, and suckin 60mp for curaga, which will also pull hate at lower levels, cura is an awesome alternative, not to mention the cast time is like half of curaga spells
The reason this is good is because with Afflatus Misery, you slowly build curing power from getting hit. The more damage you take over time with this effect up, the more potent Cura will be.
After taking ~500 damage (in one hit, dumb giant dragons) I casted Cura and it did ~200. So, really Misery is only good if you get hit by a giant amount of damage, and then use the spells related to it. imo.