Yes, I have my character use Physick outside of ACN IC sometimes too. But without the stats from the SCH class and its gear (including the book), it's going to heal for a negligible amount (and I RP it that way when using Physick IC too). This is already what happens when SMN casts Physick with a grimoire, and at higher levels where SCH and ACN/SMN grimoires are separated, even what's written in the books changes as well. Just because it can be done doesn't mean it can be done in a practical way and give the same results.
