Australia will look to finalise their selections following a round of Sheffield Shield matches starting on Wednesday, with Waugh saying the competition between Josh Hazlewood and Peter Siddle for the third fast bowling spot could go either way.
Waugh scoffed at reports suggesting selectors were reluctant to play left-arm pace men Mitchell Starc and Mitchell Johnson in the same side, describing such an idea as "gibber".
"I don't care if you've got four left-arm quicks, you put them all in," Waugh said. "It doesn't matter to me. I think it's always been overstated. I just don't believe in that old wives tale."
As for the batsmen, Waugh is backing Western Australia coach Justin Langer's belief in Cameron Bancroft as an opener, while the 168-test veteran believes Shaun Marsh would be more effective higher in the order as he is not a good "watcher and waiter" before batting.