just one video, you can find the rest 
https://www.youtube.com/watch?v=USJyGxRva5Q
about the inconsistent locations, there are actually guides on how to get some control on the blood boild spawn areas.
On one thing id agree with you tho, she doesnt need to be a seasonal objective, i give you that.
But yea, especially this season every class and build can do uber lilith. in the end it comes down to the player.