Monis' lover Amirah Droudis, 37, was on Thursday found guilty of the murder of Monis' ex-wife, who was stabbed, doused in petrol and set on fire in an apartment building stairwell in 2013.

In handing down his verdict in the NSW Supreme Court, Justice Peter Johnson said Monis had a history of affairs and relationships with different women.

"The evidence indicates that Monis had associations with a range of females over the years, sometimes simultaneously," Justice Johnson said.

"It may be inferred that Monis used his spiritual healing and clairvoyant business as a means of entering sexual relationships with a range of women."

Monis met the mother of his two children, whose murder he would mastermind, after she responded to an advertisement in a community newspaper promoting his "spiritual healing services" in 2003. They married in a religious ceremony.

He was also engaged to another woman, known only as female M and "Sister Fatimah" , who he met through his clairvoyance work. This woman died of natural causes in 2012.

Monis first came into contact with Droudis, who had a child of her own from a previous relationship, after her mother made an appointment to see Monis.

The lengthy relationships Monis had with these three women were, the court heard, at times overlapping.

But there were other women in his life too – Female P, Female C, Female B, Female S and an unidentified Chinese woman.

Monis, who adopted the persona of "Sheikh Haron", prepared scripts for multiple women to read, while wearing black niqabs, in extremist videos he filmed for a website he ran and YouTube.

At the time he was shot dead by police during the Sydney siege in 2014, he was on bail for more than 40 sexual assault charges involving seven alleged victims linked to his "spiritual healing" business and as an accessory to the murder of his former wife.

During Droudis' murder trial, flattering cards and letters from female admirers that Monis had hoarded over the years were presented as evidence of his inflated sense of self.

The court heard that even in the months before his ex-wife was murdered at his bidding, Monis made attempts to try to reconcile his relationship with her but was rejected.

Crown prosecutor Mark Tedeschi, QC, argued during the trial that Monis had the "grandiose delusions of a narcissist" and his love for Droudis was based on what he could get from her and what she could do for him.

"This is the sort of man that Man Haron Monis was. He was quite clearly the kind of man who was perfectly prepared to put this woman at risk of her life, at risk of being caught and at risk of paying the penalty for this murder," Mr Tedeschi said.

Droudis' defence team attempted to use Monis' womanising as an argument that it was a very real prospect he could have enticed another, unknown woman to murder his ex-wife.

But Justice Johnson ultimately found there was no documentary or electronic evidence pointing to an unidentified female in Monis' life as at April 2013, let alone a person who would be prepared to carry out a murder for him.

Droudis was at the "closest and most intense level of her relationship" with Monis at the time of the murder, Justice Johnson found. Droudis will face a sentencing hearing this month.