Suburbs dominated this phase of play in territory and possession but were unable to break through to really put Wairarapa keeper Phil Imray to the test, courtesy of a resolute back four.
As the half wore on, however, United reverted to playing to its strengths - balls to feet and spreading the play wide to attack down the flanks - and were rewarded with three more goals.
Paul Ryder added the third with a powerful shot from the edge of the box after being put through, Soromon added a second to his tally with a strong header direct from a free kick and defender Tim Shaeffers rounded off the scoring when he pushed forward and lobbed the ball over Borren from close range.
Despite the final score, coach Keinzley wasn't ready to heap praise on his team's display after the final whistle.
"We still can't help conceding soft goals and continue making life hard for ourselves," he said.
"But we looked way better when the ball went wide and we started going round them."
Keinzley conceded that, in general, the defence played well.
He singled out centre backs Nathan Cooksley and Waisake Sabatu for mention, together with front runner Paul Ryder who took his two goals well.
"Ryder's a good finisher and he put really himself about today. And overall, the back four were tight but they didn't get the cover they deserved from midfield. I would go as far as labelling one contribution from midfield as lazy."
The win puts United on 23 points, four points ahead of second-placed Wellington Olympic, who downed Petone 4-1.
"We're actually three points better off than I reckoned we might be at this stage of the season," Keinzley said.
"That's one bonus I'm taking from today's game."