So I am trying to remember how the Triple Experience works. Let me sketch out how I think it works and please correct me (Its been many years since I finished this patch). You go to RosenQueen and buy stuff until a survey is available that allows you a wish from the following list:
a.) Triple XP in the next battle.
b.) Triple XP for the next purification.
c.) Triple money for the next map.
d.) Triple effect for next training.
If you select Triple XP in the next battle, the next battle should be triple experience. Do you get a bonus message when you win?
Trying to track where the bug is and been too long since I played the game...
its not the triple XP for next battle, it is the triple XP for next purification that was the issue. Actually i didnt even try the other wishes (aside from checking if the lines were switched, thus i was still checking purification EXP)
but to answer your question, no, there is no message. If you were to choose that particular wish (triple XP in next BATTLE), what happens is you simply get 3x the experience for each enemy you kill (even if you kill your own allies). Thus, for the entirety of the battle, every enemy/ally killed will grant 3x the normal experience.
as for my original concern (about the purification EXP), that too doesnt provide a message. Its simply a matter of seeing the EXP value of the items increase, or in the case of a large purification, you would see the levels of the items increase.
For example, during the very first miracle tutorial in the game (map: Hall of the Dead), the game provides you with a lightning miracle. If you bought a piece of equipment with lightning element on it, and got the shop wish "Triple XP for next purification", then that item would increase to level 7. However, if you dont get the wish, then the item only goes up to level 4.
this is were the issue came, because i selected the triple EXP for next purification wish, and the item would still only increase to level 4 ....... it should be level 7.
Also, the player needs to keep in mind that for this wish, only the FIRST purification will have 3x EXP. So you need to purify the portal that inevitably triggers the miracles before purifying ANYTHING else (portals/enemies)
also, if you get the wish survey, and choose any of the triple EXP wishes, you cannot do another survey. If you do, the previous survey will be cancelled.