Lull

[Videri]

No one has answered OP's question.

OP, Lull, Soothe, Calm, and Pacify all land on mobs up to 55. However, each tier of the spell decreases aggro radius by a greater amount. For instance, if you Lull a mob and get close to it, or pull its friend close to it, it will still aggro. If you Pacify it instead, you can fight right next to it.

Secondly, the duration gets longer. Pacify is 7 minutes. You can kill multiple mobs right in front of a pacified mob for those 7 minutes. And then you can refresh it, hehe.

Off the top of my head, aggro radius reduction, duration, and mana cost are the only three factors that differ. Using that info, you can determine when to use Lull, Soothe, or Calm. But definitely scribe all of those spells. Does that answer your question, OP?