That's especially true with the World Cup set to start on March 4, and the range of contributions the White Ferns have received throughout the series must bode well for their chances in the home tournament.
Today, with India always on course for a big total after a 100-run opening stand, it was Down's chance to shine.
Rosemary Mair (2-43) was the pick of the hosts' bowlers as India were dismissed in the final over for 279, leaving the batters with another tall task after successfully chasing down 271 in the second ODI.
That task began well with half-centuries from Amelia Kerr (67) and Amy Satterthwaite (59), but Down and Katey Martin had their work cut out for them when New Zealand had been reduced to 171-6 in the 35th over.
It was work they completed with aplomb, putting together a 76-run stand from 69 balls before Down sealed it with a six from the first ball of the final over.
"That was a bit of fun," Down said. "It was great to see right across the series different people contributing.
"At 152-4, we talked about keeping it simple and trying to put the bad balls away. There'll be a couple of celebrations for the series win."