Help with Glowing Eye Effect by Cameras and Render Targets?

I'm trying to create a glowing eye effect that trails around the face when you move using cameras and render targets.

I've been trying to mimic this effect with cameras and render targets that Ben posted a tutorial on.

I've also looked into Lens Studio's Hand Eraser Stream.

I've been playing around with the cameras and render targets for this effect but I can't seem to be able to isolate only the eye image for the trailing effect while being able to have the rest of the face operate normally (without the motion blur effect). I'm not sure if this is possible but I've noticed one of Snapchat's own lenses have an effect similar to this with the eyes. I want to copy that effect with the eyes but also have the glowing effect trail on the screen for a little longer.

Here's a link of my project file but it's just a mess from me playing around with the settings.