Some effects may be displayed when an aura is missing, rather than when an aura is present, such as Priest's Shadowform.

This issue is a request to add the functionality, maybe starting with one quick and obvious inverse aura, such as Shadowform. More inverse auras may be added later on, in separate issues.

Limitations

Some auras may not always be wanted, such as Paladin's Righteous Fury. If this one is added, the suggestion should be limited to Protection Paladins. And maybe add an option for other specs.

Some auras may be difficult to suggest, such as Mage armors. They have up to three different armors (up to four, actually). and the right armor is not always obvious. If we suggested an armor, we would either need to make assumptions (e.g. based on spec and instance type) or design a complex UI to let them configure it. None of these solutions are great, so we might as well not suggest it, not before having a hefty discussion with mages beforehand.