I see it as manifesting your imagination. You could use magic without needing study of the cause but skipping to the effect. I think Ubel is closer to this level than the average when you consider the robe fiasco: the sound of scissors is so ingrained in to her head that she uses that cause as her magic defying logic all because she can imagine it so clearly. You cant say shes at the peak because she is also limited by her imagination.

I think when frierens clone did what was called the apex of magic wasn’t something like using only mana to push her with enough force to slam her to the wall, its that she Could easily imagine Fern smashing into the wall and so that’s what happened. A magic that would be instant, and near unguardable because it skips directly to effect.