The Ancient one is like the archon who wanted to create something of her own and in doing so created the demiurge, which sought the dark power apart from the truth of life. In the movie that truth of life is represented as the necessity of death.
Dr. Strange must be the Christ figure then: defeating the demiurge, derived within Sophia yet connected to the source. He sacrifices himself by descending into death, “the dark universe”.
Dr. Strange violated the natural law, or in other terms came back from death.