Didn't we just conclude it wouldn't stop a none trigger preparation?
Yes, that was the broad consensus, and I think I agree with it. I was trying to flip things around for the sake of speculation.
I'll reword the question: what if you have a triggered preparation, which is now dual-natured. For the purposes of the question it can be something innocuous, like a pebble with a Light spell. So, just a small, glowing rock, which the preparation will sustain for (Force) minutes.
Can you effectively smuggle that dual-natured preparation through a mana barrier by putting it in something else, like a skin pocket or a smuggling compartment?
I'm going to guess the answer is no, that the mana barrier will stop the dual-natured preparation even if it's within another aura (that wouldn't be affected by the barrier), but I was interested if there were any opinions to the contrary.