The form factor doesn't matter.  Esta has never been told about any fundamental constraint on [incense] other than that it has to cost three-quarters of an average urban laborer's annual salary, you have to set it on fire, and it needs to smell good when you do.

And you know what, Esta really does not want to be stuck on this planet forever, and Esta is worried that his godchosen spells are meant to communicate, "Go solve this problem right now before your Holding Bag gets destroyed by the next tidal bore going past it."

Augury has a casting time of 1 minute.  What Esta proposes, here, is that he buy all her incenses off Merrin via bona fide draft on the Bank of Cheliax; that they put all of these things into a form factor where they will burn slowly enough that each one would burn for over 2 minutes; and they try lighting all of them and see if the Augury takes hold on any of them.  Hopefully Esta will have enough of a feel for the magic to tell which incense if any the spell is hooking into, and they can extinguish any others, but that part is not as important as getting off the planet.

Also, now that Esta thinks about it, the natural thing to ask for an Augury about, would be the plan of then trying to ask a Divination about roughly how far away the Holding Bag is, and then, trying to ride the tidal bore there; or, if the Divination fails to give a sufficiently precise answer, riding the tidal bore while casting Detect Magic to try to watch for the Holding Bag.  Which means that they should only cast the Augury half an hour before the tidal bore, because that's how far Augury sees into the future on Golarion.  Esta does not know how far Augury looks ahead on a planet of intact prophecy, it should not be any less, but he does not know it to be any more.

If the Augury says that's actually a terrible idea, or if the incense doesn't work, the backup plan is asking a Planar Inquiry about what sort of [outsider] Esta should call with his Planar Binding to find or retrieve the Bag.  To which end it'd be helpful if Merrin has anything that costs around 25 times one year's worth of unskilled labor, but that she has no important use for on this planet.

The form factor doesn't matter.  Esta has never been told about any fundamental constraint on [incense] other than that it has to cost three-quarters of an average urban laborer's annual salary, you have to set it on fire, and it needs to smell good when you do.

And you know what, Esta really does not want to be stuck on this planet forever, and Esta is worried that his godchosen spells are meant to communicate, "Go solve this problem right now before your Holding Bag gets destroyed by the next tidal bore going past it."

Augury has a casting time of 1 minute.  What Esta proposes, here, is that he buy all her incenses off Merrin via bona fide draft on his bank; that they put all of these things into a form factor where they will burn slowly enough that each one would burn for over 2 minutes; and they try lighting all of them and see if the Augury takes hold on any of them.  Hopefully Esta will have enough of a feel for the magic to tell which incense if any the spell is hooking into, and they can extinguish any others, but that part is not as important as getting off the planet.

Also, now that Esta thinks about it, the natural thing to ask for an Augury about, would be the plan of then trying to ask a Divination about roughly how far away the Holding Bag is, and then, trying to ride the tidal bore there; or, if the Divination fails to give a sufficiently precise answer, riding the tidal bore while casting Detect Magic to try to watch for the Holding Bag.  Which means that they should only cast the Augury half an hour before the tidal bore, because that's how far Augury sees into the future on Golarion.  Esta does not know how far Augury looks ahead on a planet of intact prophecy, it should not be any less, but he does not know it to be any more.

If the Augury says that's actually a terrible idea, or if the incense doesn't work, the backup plan is asking a Planar Inquiry about what sort of [outsider] Esta should call with his Planar Binding to find or retrieve the Bag.  To which end it'd be helpful if Merrin has anything that costs around 25 times one year's worth of unskilled labor, but that she has no important use for on this planet.

The form factor doesn't matter.  Esta has never been told about any fundamental constraint on [incense] other than that it has to cost three eighths of an average urban laborer's annual salary, you have to set it on fire, and it needs to smell good when you do.

And you know what, Esta really does not want to be stuck on this planet forever, and Esta is worried that his godchosen spells are meant to communicate, "Go solve this problem right now before your Holding Bag gets destroyed by the next tidal bore going past it."

Augury has a casting time of 1 minute.  What Esta proposes, here, is that he buy all her incenses off Merrin via bona fide draft on his bank; that they put all of these things into a form factor where they will burn slowly enough that each one would burn for over 2 minutes; and they try lighting all of them and see if the Augury takes hold on any of them.  Hopefully Esta will have enough of a feel for the magic to tell which incense if any the spell is hooking into, and they can extinguish any others, but that part is not as important as getting off the planet.

Also, now that Esta thinks about it, the natural thing to ask for an Augury about, would be the plan of then trying to ask a Divination about roughly how far away the Holding Bag is, and then, trying to ride the tidal bore there; or, if the Divination fails to give a sufficiently precise answer, riding the tidal bore while casting Detect Magic to try to watch for the Holding Bag.  Which means that they should only cast the Augury half an hour before the tidal bore, because that's how far Augury sees into the future on Golarion.  Esta does not know how far Augury looks ahead on a planet of intact prophecy, it should not be any less, but he does not know it to be any more.

If the Augury says that's actually a terrible idea, or if the incense doesn't work, the backup plan is asking a Planar Inquiry about what sort of [outsider] Esta should call with his Planar Binding to find or retrieve the Bag.  To which end it'd be helpful if Merrin has anything that costs around 25 times one year's worth of unskilled labor, but that she has no important use for on this planet.