Sub-AU

Yes, this fandom is really that crazy.  AUs of AUs of AUs. We have reached inception level and passed it.  

The AUception cannot be stopped.  

Friends with Tax Benefits (FwTB) AU

Main article: Friends with Tax Benefits AU

Drift AU

Main article: Drift AU

Friends with Tax Benefits AU happenings + Drift AU

Main article: Friends with Tax Benefits + Drift AU

Equivalence AU

Main article: Equivalence AU

Demonic twins AU

An AU in which both Dipper and Mabel become demons. This AU takes from both the original Transcendence AU , as from the Equivalence AU.

Since the energy is split between the two of them, they’re both a lot weaker at first. They can’t affect the mortal plane outside of summons, and they can’t break out of a summoning circle without some sort of an energy source and since there is no twin in the physical plane who can automatically see them , it takes them years to be able to contact their family . In this aspect it resembles the Drift AU but with the difference that they have each other and thus at least don't suffer from loneliness. From here this story can also takes a split, even if not as drastic as the Drift AU split . In that time of only having each other they could try to keep each other human or they could try to help each other accept that they have become demons and thus need accept their demonic tendencies. They want to help each other but we can't say exactly HOW they help each other . Maybe they mix both

The TWIN STARLETS AU is the good split. It can be found here

Avarice AU

Main article: Avarice AU

Wayward souls AU

Main article: Wayward Souls AU

Loophole AU

Main article: Loophole AU

Transcendence +Relativity falls AU

Main article: Relativity AU

False Memories AU

Main article: False Memories AU

Atlantica AU

Main article: Atlantica AU

Someone Like Me

Main article: Someone Like Me AU

Broken Prophecy AU

Main article: Broken Prophecy AU

THE OFFER ACCEPTED

Main article: Offer Accepted AU

FEEDBACK AU

Main article: Feedback AU