Yesterday, my friend Valhadow and I thought of getting getting all the achievements done in Valley of Eclipse since he wanted the Moonlight Prince title. However, one of the requirements was to get the Rule Abding title first and in order to get it, you'd have to invade and eliminate all the monsters in the 4 different corners of the map in the correct order. I wanted to take the easy way out by google-ing but surprisingly, there was no guide.
So, if you're trying to figure out the correct sequence as well but can't be bothered to experiment and see for yourself.. then just follow in the order as numbered on the map.
(Does it resemble the tiny in-game screenie version? my editing skills are terrible, I know. )
So... there you go. Just move the topic if it's misplaced~