Hmmm... I want to say wait on using the magimystical clue for now. We have no idea how far we are from this particular fragment and a hint may prove to be more useful later on when we're really stuck that early on. The fourth fragment had a dozen moving parts where a hint could have saved us a bit of frustration, but if we had used it too early it would have felt like wasting it.
But keep in mind, that magimystical word wasn't entrusted to me, so I think that it is ultimately up to the person who was given the word. The Book trusted them, not me, so take everything I say with a grain of salt. I'm not above using the hint, I just think we might be able to suss this out on our own in a day or two.
That being said, I don't know where we would look in the next few days that we haven't already looked at in some detail already. Is there a hint still in the vines within the gate on the page, some clue hidden in the arrangement of the words/passages? I have no idea but I'm not ready to give up just yet.
I'm also bloated on tryptophan and alcohol so keep my "RAH! RAH! We can do it!" rant in perspective.