With skipper Sharelle McMahon among several top-liners unavailable due to injury, Plummer took the chance to punt on youth on the recent tour to England and Scotland.
It meant valuable game time for youngsters such as midcourt player Madison Browne, 22, shooter Kate Beveridge, 24, and defender Laura Geitz, 22.
All had minimal or no previous international experience, but played significant roles in a hard-fought series win over England.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
Plummer believes that will be vital as she chooses her squad for the New Delhi Games, with hard experience having taught her the value of depth.
"You only need to get an injury and then there's an opening," Plummer said.
"I've had my fair share of injuries - 2008 I lost my three shooters, I lost (Catherine) Cox, (Natalie) Medhurst and McMahon and had to bring younger players in and we were still able to get 2-2 against New Zealand.
"In 2009 I lost all the defenders, at different times we didn't have (Bianca) Chatfield, didn't have (Mo'onia) Gerrard, didn't have (Julie) Corletto, yet we won 3-2 against New Zealand.
"Given the opportunity it's amazing what youth can do for you sometimes."
The Australians, who lost to arch-rivals New Zealand in the final in Melbourne in 2006, are out to go one better in Delhi, but Plummer acknowledges it will be tough, with Jamaica and England also set to provide stiff opposition.
A shadow squad will be selected after the trans Tasman competition grand final in July, with series against Jamaica and NZ in August and early September to help finalise the 12 for Delhi.
