"She's in really good order. She came through the Sires' run the other day really well," Richards said.
"She's a straightforward filly, doesn't overtax herself on the training track. Opie [Bosson, jockey] was happy with her work on Tuesday. She's in good form and we can't fault her. What she's been able achieve in her career so far has shown us she's pretty special."
Shocking Luck, a $5 favourite for the Derby, returns to the scene of his Gr 3 Rough Habit Plate (2000m) triumph last month, having weakened to sixth in heavy going in the Grand Prix Stakes (2200m) at Eagle Farm a fortnight ago.
"He worked with Zambezi Warrior on Tuesday and Opie was really happy with him, too. He said it was as good, if not better, than going into the Grand Prix," Richards said.
"Going back to Doomben on a better surface is going to help him and he's got a lovely barrier [drawn one]. He'll get handy and track the speed and should get a good run from there.
"This is the last start he'll have for us before heading up to Hong Kong so hopefully we can send him off on the right note."
Richards rated Zambezi Warrior a "realistic chance" in the Brisbane Cup (2400m) after a fourth placing in the Gr 3 Chairman's Handicap (2000m) at Doomben and second in the Premier's Cup (2200m) at Eagle Farm at his past two starts.
"He's in good form. He's improved out of sight on the trip and he's thrived since the race the other day," Richards said.
"He's not great away from the gates so he'll probably get three or four back on the fence from the draw [barrier three] and he might need some luck from there. Jeff Lloyd rode him in work on Tuesday and he was happy."
Richards said the carnival had been a "massive learning curve" for him personally, having to deal with the frustration and repercussions of missing the payment deadlines for Melody Belle and Shocking Luck, meaning both had to have late entry fees paid, but a successful day today would give him immense satisfaction.
"It's pretty daunting to have the favourite for both the JJ Atkins and Queensland Derby, but also a massive feat for us and that all stems from the horses Dave [Ellis, Te Akau principal] buys, the support from our owners and the efforts of our entire staff. It's exciting but I'm more nervous than excited at this stage to be honest."
- NZ Racing Desk