Saltheril's Soiree

It seems each of these are one-time actions per week, the (5) just states that they grant 1/5 (20%) of the progress for this quest.

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• Song chosen: In the building behind Lord Saltheril, you can find [npc=249499] in the back, choose a song from her.
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• [object=568038] known locations:
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    [li style=circle]stuck in the archery target east of [npc=240836]
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• stuck in the tree to the south
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• [object=568047] known locations:
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  • directly west of Dawnfletch, in front of a black cushion on the right side of the carpet (credit: Rantsi's screenshot on this page, although at that zoom, I still had to search every carpet to identify the location :P)
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  • upstairs in the building, near the wardrobe (credit: Rhenochka)
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• [object=568299] known locations:
  
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  • inside the building behind Lord Saltheril, ~10 o'clock
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  • upstairs in that building
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  • on the pagoda pillar behind [npc=240838] (credit: Jadedestiny in the replies to this comment)
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• To find the [npc=249396], type [inline-code]/tar runa[/inline-code] - there should be 2 tomes active (sometimes in the same location) but you can only click one of them. Saw them upstairs in the building, as well as on the grass west of it.
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• The [npc=249457] is near the fountain, basically unmissable.
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• (presumably) [DNT] Kill Credit: Gossip is now fixed: pick up a [object=570823], found on several tables, and talk to an [npc=250190] to give it to them. Whether you credit the Magisters or "some friends" doesn't seem to make a difference, pure RP.
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No idea what the first "Kill Credit" is, yet.

If you are at 80% and dont know what to do - look at the Screenshot of Rantsi. There is a very small card to click. It was the last one I needed. Ty Rantsi <3

There may be one or two more things but this list should be enough. If others are found I will add

/way #2395 43.0, 46.71 Unlit Lantern
/way #2395 42.52, 47.61 Talenia Flamesong
/way #2395 42.7 46.9 Farstrider Arrow
/way #2395 42.9 46.4 Farstrider Arrow
/way #2395 43.0 47.7 Farstrider Arrow
/way #2395 42.8 46.4 Marked Card
/way #2395 42.6 47.5 Marked Card
/way #2395 43.5 47.3 Decorative Shield
/way #2395 42.4 47.0 Runaway Tome
/way #2395 43.0 47.5 Runaway Tome
/way #2395 42.4 47.5 Runaway Tome (2nd Floor)
/way #2395 42.7 47.8 Runaway Tome (2nd Floor)
/way #2395 42.7 47.9 Wine Glass (2nd Floor)
/way #2395 12.5 47.4 Decorative Shield (on pillar 2nd floor)

Edit 3.27.26 Added Several Locations
Edit 7.13.26 Added location