Two people involved in separate kidnappings and attacks on a teen found bound and near dead in the Dome Valley have each been sentenced to more than two years' jail.

Michelle Blom was last month found guilty by a High Court jury of helping kidnap the then 19-year-old woman off Auckland's Karangahape Road in May 2016.

The teen was later detained and sexually violated in an Auckland basement before being taken to Dome Valley, bashed in the head with a hammer and left for dead, although Blom was found to have not been involved in these acts.

The same jury found Cameron Hakeke guilty of taking part in a separate attack on the young woman last April, during which he cut her hair and took part in her kidnapping.

On Friday in the High Court at Auckland, Justice Christian Whata sentenced Blom to two years and nine months in prison and Hakeke to two years and five months' jail.

Blom and Hakeke's sentences come after three other people, Wayne Blackett, Nicola Jones and Julie-Ann Torrance, pleaded guilty or were found guilty of attempting to murder the young woman.

They are still awaiting sentencing.

During the trial, the court heard the attacks started after Jones became angry with the young woman early last year, with her lawyer saying she believed the woman had slept with her partner.

Then in April 2016, the young woman was lured to Hakeke's Newmarket flat under the false pretence of a drug deal.

There, she told the court, her childhood friend Jones, along with Torrance and Hakeke, ambushed, bashed and tasered her with a stun gun before threatening to repeat the attack if she did not leave Auckland for good.

Then one month later, Jones, Torrance, Blom and a sixth accused, Jaclyn Keates, picked the woman up from Karangahape Road and took her to Blom's west Auckland home, where prosecutors say she was bashed with a cricket wicket and bat and sexually violated.

Following a prolonged attack, Jones, Torrance and Blackett drove to Conical Peak Road with the young woman tied, wrapped in a tarp and thrown into the boot of their car, according to prosecutors.

After trying to strangle the woman, Blackett took a hammer and delivered at least 10 blows to the woman's head, causing multiple fractures and depressing her brain by 2cm, prosecutors said.

Keates pleaded guilty to her part in the May assault and was sentenced to jail last December.