Most of the see invis mobs are level 115+. This is how I was showing them on my map.
1. When you zone in, type: /alert add 1 npc range 115 200
2. When you are getting ready to move, type: /highlight alert 1
The first line adds a spawn filter for 'npc' and level 'range' 115 - 200
The second line causes spawns that match the 'alert 1' spawn filter to be highlighted.
After spending a couple hours moving around you'll see the pattern to were they are.
1. When you zone in, type: /alert add 1 npc range 115 200
2. When you are getting ready to move, type: /highlight alert 1
The first line adds a spawn filter for 'npc' and level 'range' 115 - 200
The second line causes spawns that match the 'alert 1' spawn filter to be highlighted.
After spending a couple hours moving around you'll see the pattern to were they are.