Everyone knows that reading unnecessary text is tedious, and it might even add stress to our eyes due to the act of separate useful and useless information. Aion isn't different. With this guide, you'll be able to create a radar that warns you about the pressence of nearby enemies from the opposite faction, using only a chat window!
The process is really simple. If you are a new player, unaware of the chat potential, this will also teach you some new things. Aion players know the potential of a well used chat settings. Here we go:

Pretty self explanatory. We need to add a new tab that will work exclusively as a radar.
We will learn how to make it standalone later.
We click on Chat Preferences Menu (a gear icon on the top left of the chat window), then we click on the top option Add tab

As soon as we create the new tab, the Chat tab options window will pop up. (If you accidentally close it, Right click the new tab in the chat window and select Tab options)

Scroll down through the options until you find Combat - Others. Open it, and mark ONLY the ones I marked. If you mark any other, you will constantly get wrong information.

Color is important. We need to choose some color that can have our attention. To do so, scroll up again until you see the root of the Combat - Others, then press the Square on the right and choose a pretty striking, dazzling color.

We need to move this new tab outside of the main chat window. Easy doing, just hold click the tab...

...and move it somewhere visible. I moved it on the group window area.

To avoid our new chat window being annoying to the eye, we will lock the chat window. To do so, we click again in the gear of Chat Prefferences Menu and click Lock chat window

If you have the correct settings for EFRC, you'll have something like this everytime an Asmo / Elyo walks nearby using items, skills, healing effects, etc.
"Someone is in Hide state as it used Hide" means he's Assassin / Ranger, good luck :p

That's all, it was simple, I hope you liked this guide and find useful the radar. Thank you for stopping by, and good luck in the world of Atreia!!