"We're trying to mix and match a little bit to see who we can take to the World Cup and who can handle the pressure in different situations. It's not just Elton and Handre… after six matches I'm finding out about players in different situations. I think this team is the closest to the strongest 23 that we've put out for the seven tests we've played."
Like the rest of the world, Erasmus can only admire the way the All Blacks use the ball despite often being behind in terms of territory and possession.
"I don't think it will be physicality in this game [that decides it]… the way the All Blacks are playing, there is so much finesse in their game, they are so good at taking small opportunities.
"We currently are creating opportunities and just throwing them out the window every single time. I think obviously both teams will have to compete physically because that's New Zealand and South African rugby, but, I don't know - we have to capitalise on opportunities like New Zealand do if we are to be successful in this game."
After saying he was in danger of getting the sack should his side, who haven't won in New Zealand since 2009, lose on Saturday, Erasmus, in the first year of a six year contract, has received backing from his employers.
He wryly noted that such support wasn't always good news for a coach in the spotlight, but Erasmus is building for the future and his bosses appear to appreciate that. A victory at Westpac Stadium, while unlikely given the respective form of the two teams, would be a massive boost for everyone involved in the game in South Africa.
"Everyone knows if you beat New Zealand in New Zealand you're back to where you want to be and your planning is on track.
"That's how we see it – it doesn't make it any easier – but if you beat New Zealand in New Zealand life is good."