As the reluctant men failed to land blows in a messy exchange, Solomon and George grew frustrated and launched a savage attack on Ratima.
At 190cm tall and weighing 130kg, Ratima was an imposing figure. But witnesses described him as a "gentle giant" and prosecutors said the two attackers knew, that as a prospect, he was not allowed to defend himself.
"He was not allowed to fight back. This was violence of the most cowardly sort," Justice Hinton said.
In a statement read to the court on Friday, Ratima's aunt described him as a humble man who would have "given the shirt off his back".
After the killing, George went home. Solomon departed to a "gentlemen's club" in central Auckland, leaving others to take Ratima to the emergency department seven hours later.
Ratima had two fractures in his neck and a swollen brain, the court heard.
He died soon after.
Prosecutor Natalie Walker on Friday described the killing as a senseless act of "gratuitous, wanton violence".
The defence argued the prosecution's key witness - the man told to fight Ratima - was very drunk at the time, and had initially not even mentioned the defendants to police - only changing his story later to protect himself.
On Friday, lawyer Shane Tait said Solomon had fallen in with the gang after being made redundant and had no history of violent convictions.
George's lawyer, Adam Simperingham, said his client was "genuinely remorseful".
Having never finished his first year of high school, Ratima fell in with the Tribesmen while changing tyres for a living in Otara. Members of the gang - including George - attended his funeral, leaving a patch on his coffin, to the dismay of family, the court heard.
- NZN