Souness underlined her reputation as one of the most exciting midcourt talents with an outstanding debut against South Africa, which saw her rewarded with the start against England in Auckland last week. Having had some tough questions asked of her, Crampton responded with a strong outing against the Diamonds on Sunday.
The performances of the pair has created some difficult decisions down the track for the selectors as they look to settle on their top 12 for next month's Constellation Cup series against Australia.
The return of Kayla Cullen from injury has further put the squeeze on the midcourt. After making an unscheduled appearance against England last week, when she came into the side as injury cover for young defender Kelly Jury, Cullen will have further opportunity to rebuild her match fitness and confidence over the next three games.
While the Ferns are light on cover at goal defence - a position Cullen spent a bit of time in during the ANZ Premiership season - Southby wants Cullen to focus on the wing defence role in the upcoming series. as she works her way back from a string of injuries.
"We want Kayla to get back and get her groove back. We saw the best of her at the 2015 World Cup and we started seeing some of that return last year before she got injured, and again she was just started to come right with the Stars this year and unfortunately she got plagued by injury again," Southby.
"So the big thing for us is that she gets her confidence back and gets back on court at wing defence, and then we will look at coverage of positions after that."
The area where selections seem to be most wide open is in the defensive end, with incumbents Jane Watson and Phoenix Karaka having quiet outings in their appearances across the Quad Series. Fakahokotau, who last played for the Ferns back in 2014, will now get her chance over the next week to push her case for a more permanent position in the New Zealand defensive end.
The Taini Jamison series gets underway in Poriria tomorrow, before the series moves to Napier and wraps up in Hamilton.