The game lost some structure as both teams threw the ball around. Four tires were scored, two to each team, in a 14-minute spell but the crowd weren't complaining.
"That's Maori rugby at it's best, mate," said Simpkins, whose side are one point behind Wanganui with one game remaining before the playoffs.
Fisihoi and Coast openside flanker Brent Ingram shared the man-of-the-match honours with lock Everard Reid, Semple, blindside flanker Tanetoa Parata, wing TK Moeke and halfback Charlie Harrison also playing well.
East Coast 56 (John Semple 2, Ziggy Fisiihoi 2, Verdon Bartlett, Pomare Samupo, Whaimotu Craft-Chemis, Everard Reid, Brent Ingram, Ben Parkes tries; Semple 3 cons) King Country 24 (Paul Olsen 3, Dean Church tries; Sean Cressy con, Kurt Strachan con). HT: 29-12.