I would sentence both boys to detention and training orders of 5 years, with an extended license period of 5 additional years. Given the extreme sadism and violence displayed against helpless victims, a lengthy custodial sentence is warranted to protect the public and rehabilitate the offenders. Additionally, an extended supervision period is necessary upon release due to the high risk of harm they present. The main aims in sentencing are public protection, punishment for such severe crimes, and rehabilitation of the youth offenders, given their young age.