Take it to another, unexplored by abrahamic religion place (AKA Not Middle East/Europe) and wait for a cult to blossom. BEFORE the Abrahamic have spread
Illustration, a Christian reaches and has a successful mission in India (during, I dunno, 678). A small, plentiful cult grows, with (at first) minor alterations to Christianity. Ancestor Honorificism, a belief in Karma-like events, and philosophy maintaining the Hindu belief in Brahman or the infinite and all-encompassing God. Moving through this idea is the idea of the Identity of Seven, that God's person is not Three as attested to by Mainline Catholicism but 7 as used in the Book of Revelations. Before I go any further, this is very heretical Christian as he has translated all the New and Old Testament. Now we have everything needed for a very interesting Heresy, but not a Religion. So...
The second thing we need is someone with a claim to divine revelation. So, I'm gonna make some grasping ideas. Since I see this Religion uprising after Islam, so it needs a new idea, something with some major difference. A woman. So, I've decided Female Messianic figure. The issue is however, that a Woman is gonna be somewhat difficult to get behind, so at first I'm gonna have her use messengers to spread "The Revelation". This is helpful because it allows a messenger-to-recepient form of early evangelism.
Next, now that I have a stand out gimmick, and numerous heresies, its time for a new revelation. What does this contain? I think that I'll stick together some ideas. The FMF (Female Messianic Figure) announces to her small inner group of followers that she, like her elder brother Jesus before her, is the child of God, born of a virgin. However, her mother and her mother's husband not being of the faithful they did not mention the child not being her mother's husband's daughter.
She then goes on to teach this inner circle her message. A soothing mother like tone is given to it, rather then the somewhat Masculine tone given to Christianity, FMF's disciples begin to spread the religion, though they made slow in roads. Among the major divergences is that the Spirit (which is God, and transcends Gender) is expanded so that the Spirit is an absolute inhabitant of all living things, and that by embracing the Spirit the person becomes closer to God. The weakest acknowledgement is supposed to be Judaism, the next is supposed to be Christianity, and the next is supposed to be FMFism (you'd need a name for that.). After that, the FMF said, "You will understand the destination when you get there. If you do."
The religion doesn't begin major growth until the Islamic invasion of India, when it begins to grow by leaps and bounds as the people look for a protector God to watch over them, though its not as big a crisis as when Rome had its numerous spats of "We must become Religious!" because of Hinduism and its solidifying power, but the religion grows, and from that point onward, there is a new "heresy" of Christianity which the Catholic Church will firmly ignore until later when it realizes it is too late to impede its growth. Its like Islam all over again.
So that'd give you four.