Ben Kiore started things off in the 15th minute and Keiran McMinn doubled the Wanderers lead two minutes after the break. Kiore struck his second soon after and Ben Mata added the fourth on the hour mark.
Luke Horn grabbed a consolation goal for the home side with five minutes left on the clock.
Defending champions Auckland City FC earned their first win of the competition with a home 1-0 victory over Heartland Wairarapa, Harrison Bolton-Roberts scoring the decisive goal with 10 minutes to go at the Croatian Cultural Society ground in west Auckland.
On Sunday, Nelson Marlborough Falcons leap-frogged Waitakere United to lead the table on goal difference with a 2-0 home victory over Auckland United at Trafalgar Park.
Kevin Obed gave the home side a 20th-minute lead and Carl Conner-McClean scored an 80th-minute insurance goal to keep the Nelson-based team, competition runners-up in 2013, perfect after three rounds.
Southern United continued their strong start to the year by recording a 2-1 victory over Team Wellington to move into third place.
Lewis Jackson's second-half double paved the way for Southern's victory at Tahuna Park, with Team Wellington pulling one back through Finn Moore.
Canterbury United were 3-1 winners over Manawatu United at Ashhurst Park as Ryan Stanley scored two of the visitors' three goals.