After both missed all playoff rugby last year, Poverty Bay and Horowhenua Kapiti fought out a 13-13 draw in Gisborne, to finish second and fourth respectively.
South Canterbury now play North Otago, who as expected put East Coast out of their misery with a 45-5 hammering in Oamaru.
Robbie Smith and Samisoni Tongotongo each scored two of the home team's seven tries.
But all efforts pale in comparison to Buller, who are now hot favourites to lift the Meads Cup, as they completed an unbeaten round robin with a 49-36 win over Wairarapa Bush in Masterton.
Buller would be the envy of Wanganui, as they won all three of their North Island tour games with bonus points. Even with the top spot all sewn up before Saturday, they did not let up, as Ilisesa Ravudra scored four of their seven tries, with James Lash converting the lot.