There definitly a hierarchy of which feather takes how much time.
The stone fades 4 times before it disapears. 0 fades = you get a regain feather (hp/mp/tp) 1 fade = you get a rebirth feather (reraise3) 2 fades = you get revive feather (reraise1) 3 fades = you get fire feather (enfire) 4 fades = you get blaze feather (blaze spikes) 5 fades = mimeo stone disapears and you dont get anything
I tested this, because i got regain feather before anything else, without any fades.
2nd time i got up, with no fades, and it said "You cannot obtain another regain feather." so i waited, and eventually it said "the mimeo stone starts to fade away", and i clicked the cradle again, and i got rebirth feather.
i did this again, and after "you cannot obtain another rebirth feather" i got revive feather
So yes, you can hold all 5 feathers at the same time, after you use a feather (only tested with regain so far) you have to wait 2 hours before using another medicine.
There are 6 pops of luminent, scattered around the mountain. The 1st time that I did it, i went down again, and luminent was up right away. The other times it has taken a long time for it to repop. I suspect either its a random repop time, or that it pops at a certain time during the day, i tested 0:00, but it wasn't up.
There are 6 pops of luminent, scattered around the mountain.
Before you call BS...maybe he got lucky and it popped nearby. Or maybe he's a THF and he used Flee and got lucky with the vents. Or a BRD with Mazurka. Let's not accuse him of hacking yet...his post is the most informative one on this page so far.
Judging by the posts, It appears that when you take the "Mimeo Stone" that you get from the Luminent to the top of the Tor (Cradle of Rebirth). You may receive one of the following items. There is no solid evidence to suggest that the reward is time based. My theory at the time of posting is that you receive a random feather after completing (needs testing).
Man. They totally should have called this the Phoenix Down.
At any rate, it's still awesome... I've heard different theories on what it does, from Reraise II/III to Full HP/MP when used. Both GREAT things to have, either way. Full HP/MP when used... Maat fight, anyone? >.>