Hi, Wither and Immolate not listed in... I tried adding them myself in Lua, but I couldn't figure it out. The spell appears in the list and has an icon, but it doesn't display in the object's frame. If it is possible to add them yourself, it would be great if there was a guide somewhere on how to do this.

Also it would be nice if we're able to add per spell ID any spell we want to.
There's an addon called "Big Auras" in 3.3.5. It implements the ability to add by ID. This method may be outdated, but I'll leave this information just in case.