Follow-up; here are the relevant stacking pages for the bard song (and note that all this data is scraped from the spell files in game, so it's not subjective):
Cantata of Replenishment:
https://lucy.allakhazam.com/stacking...59&source=Live
Niv's Melody of Preservation:
https://lucy.allakhazam.com/stacking...48&source=Live
Hymn of Restoration doesn't even have a stacking page:
https://lucy.allakhazam.com/item.html?id=15007
The way Lucy stacking pages work is that they list everything that uses up the same stacking "slot" ... iel. everything that
doesn't stack. Thus, not having each others' names listed indicates that (on live at least) all three stack.
If you look at the history tabs on those songs, it doesn't
seem like the stacking changed, except for this entry:
Quote:
2008-07-09 02:52 Changed Spell_class from to 5
2008-07-09 02:52 Changed Spell_subclass from to 51
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I'm honestly not sure what Lucy thinks a "spell class/subclass" is, so that
might indicate a stacking change in 2008, which would completely explain the difference between P99 and live. Or it might be some meaningless unrelated change, and P99 could actually have a flaw in their spell stacking.
Not being a bard, I'm honestly too lazy to look, but if someone cared you could start by looking at the release notes in July 2008 to see if they mention stacking changes, or you could learn what a spell's "spell class" is in official terms.
Again, the devs here like making things more classic, so if those songs don't stack and anyone can find proof they should, it should mean a fix. And if anyone can show that they
did change on live, and that there's no bug in our classic EQ code ... I'll happily update the Buff Lines page.