Just a Weakaura to keep track if you are standing on your own with "Incandescent Sliver" equipped. Check for nearbys wearing the same trinket enabled via Buffchecking.
It also shows the stack count of the buff.
In the Custom Options tab you can set the refreshrate to fit your computer resources.
If someone has an idea how the range-check is working without group or other ideas, just leave a comment.