Hmm, now you got me thinking about Orbius again...
We had a discussion not long ago about rote spells and supplemental actions. In addition to the mundane grapple rules, there might be a way to work out an Orbius, that is not quite as powerful as the one in the book.
If you want to inflict stress or move someone you have in a grapple you have to take a supplemental action, reducing your might roll by 1. Why doesn't this apply to the spell as well?
The spell has an effective power of 3 AND it inflicts stress. The same grapple using might would need to roll a 4 to accomplish this. Doesn't really seem fair. Without the stress, a grapple is just a block to all actions, nothing wrong with that. If you want to use the grapple rules on that, reduce shifts as needed. And suddenly, if you want to move a target and inflict stress, it only has to roll +1 to break free, which should be easily done.
It would still be a powerful spell, but to be actually useful, you would need to put a lot more shifts into power and have less left for duration.