Game Mechanics Bosses/elite mobs killed Shiny tracker

Well here is an old idea I had that is simple at first glance but hard to implement suggestion.

That suggestion is a new Shiny tracker for mythic, and it would be a tracker for bosses and rare/elite mobs killed. The reason that this is difficult is due to needing to be manually done, along with defining what counts as a boss or elite mob.
Since this could or not include world event bosses/minibosses, raid bosses, dungeon bosses/minibosses, boss alter bosses, quest mobs, cave bosses/minibosses, lootrun encounter bosses/elite enimies, secret bosses, joke bosses, multiphase bosses, Standard bosses like LI, hive, and TOA, and maybe rare mobs, but not sure if that one counts.

This one would be very hard to implement, but might be a neat shiny identifier.
But then again "what even counts as a boss" So maybe it simply should be an elite mob killed tracker. [for non fodder enemies]

 

Internally there's nothing that dictates whether a mob is a boss or "elite". This would require every boss and "elite" mob to get a tag specifically for this tracker.
In other words, would take developer work to implement the tag and a lot of time flagging every single boss and "elite" mob

 

makes sense, so its unrealistic like I thought simply thought I should float this idea around.