"He twisted their view of life and encouraged them to believe what was happening to them occurring was innocent and acceptable," Mr Mallalieu said.
He said Rubick exposed the young boys to pornography, and engaged in masturbation and oral sex. Police found 12,157 objectionable images in Rubick's possession of varying degrees of seriousness.
Victim impact statements read to the court spoke of the disgust and hate for Rubick and the ongoing affect his offending had. Defence lawyer Stephen Ross said Rubick was aware of the long-term harm suffered by victims.
"He is instructed me to apologise but he accepts that apology is unlikely to be accepted and nor should it be."
In sentencing Justice Ron Young acknowledged Rubick's guilty plea but said he showed little remorse. He said Rubick's offending rate seemed to have increased over the years and considered him highly likely to reoffend. Justice Young said Rubick was skilled in identifying vulnerable boys.
"There are eight boys' lives who you have seriously compromised."