Justice Sheri Donegan said she will set a date next week for her decision, but it will be months away.
Each man is charged with one count of polygamy.
Both men served as bishops for the Utah-based Fundamentalist Church of Jesus Christ of Latter-Day Saints.
Blackmore's lawyer Blair Suffredine said in closing arguments Thursday that records presented as evidence, some of which were incomplete, were unreliable and that the Crown had to prove the accused had both a marriage and conjugal relationship with multiple women over 24 years.
The records, which were seized by police in 2008 when they raided the church's Yearning for Zion Ranch in Texas, included marriage and personal records for members spanning the U.S. and into Canada.
Wilson told the court the documents as a whole contain corroborating evidence that fill in gaps for individual records.
Wilson also argued that the Crown does not have to prove the polygamous marriages were a continuous relationship, as suggested by Suffredine and Joe Doyle, a court-appointed lawyer who is there to ensure a fair trial for Oler, who is self-represented.
Wilson pointed to a constitutional reference case in 2011 that defined polygamy as a crime and that the harms outweigh the individual rights to freedom of religion.
Part of that ruling concluded the Crown does not have to prove relationships were ongoing or whether they lasted or not, just that a marriage or a conjugal union had occurred, Wilson said.