I'm a little shy to put this up here, but in the process of helping someone that effort turned into a small project. The end result being that my inner geek got out and I went into the shader files to see if I could learn anything about them and how or if I could use them with customized textures. It went a little further than just looking.

I ended up with a sort of fading flame effect on the Lost Ancients and Crystalshaper trainer in the Firey Rift.

You can download the file from here if you wish.

Please understand that it is a work in progress so it may not work perfectly and any suggestions would be welcome.