I think that the old indicator or ring that shows you have a buff needs a good rework. I think it would be awesome if when a buff dies the spirit on it's back becomes a ring with the same texture then flies to your character and plops down onto the ground under you. I have seen the buff ring change before and with a map rework happening again I feel like it is really needed. Of course you can pick whether the buff is active right away or not until it hits the ground.
I actually think that killing a buff should just be defeating it, and then once its defeated, it becomes your slave and fights for you. The slave ownership would still transfer with kills though, of course.
I can actually envision a pretty cool animation for this sort of thing. Kill blue/red and the essence within swirls up and out, then flies to the one who secured the buff and swirls around them to form a ring that settles at their feet. I think it would give a better visual indication of having inherited the monster's power versus this magic buff suddenly appearing. With a focus on clarity, well... It just makes sense.
