Made a new one of each in this first view you can see what the rings look like on a PC targeted.
On the far right is the target ring alone, second from the right is the assist ring only, the next 2 show the assist ring in various phases of pulsing. The spines on it pulse in to make it more visible.
This next view shows the rings on a raid mob
To install download the attached zip file and unzip the contents and place it into your custom UI directory. Then log in and use the following 2 commands:
/indicator off
/indicator on
And you should be all set.
Hope ya enjoy