If there was another thematic loot event...

[Ennewi]

...ideally, which raid targets would drop what loot?

For those who weren't present, various coveted loot was added and seemingly not at random, often flavorful to match the mob type/name. For example, Eashen of the Sky dropped a Robe of the Azure Sky which was clever. Unlikely we'll see an event of that scope again but it's fun to consider, especially from a GM perspective. IMO...

Tunare would drop Shroud of Longevity because it has fungal regrowth and, like her dress, it's green. Robe of the Spring for similar reasons. Rowyl's Metal Armguards because they're also green and druid-only. Plus maybe a Crown of Rile due to the click effect and the fact that she is donning a crown. Yunnb's Earring just to troll, since it has the same icon as Golden Leaf Earring.

Inny would drop a guise for obvious reasons. Maybe add Willsapper and Girdle of Dark Power. Not sure what else.

Maestro would drop Kelsiferus' Armband of Artistry because of his bardic ties/regal fashion, PoS horn, and the resulting spawn would drop Hand of the Master instead of or along with Hand of the Maestro.

Draco and Ashenbone Broodmaster would/could share the same drops.

ST golems...Gharn's Rock of Smashing because they themselves are made of bluish stone material. Also because of the whole, "Is it slashing?" nonsense years back, but now smashing instead of slashing. That plus Hammer of the Dragonborn alongside primals.

Hoshkar would drop Cloak of the Falling Stars as a nod to their ordinary drop, Blade of Falling Stars.

Zlandi would drop Onyx arms, legs, and gaunts because they're black.

Dagarn the Destroyer? Ring of Destruction.

List goes on.