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"She has very good skills, we expect her to flatten our attack and we want her to bring that gain line a bit closer to us because we were way too deep and getting caught behind the advantage line last weekend.

"She’ll bring that speed onto the ball and put pressure on that defensive line."

The Brumbies lost their season-opener to the Waratahs 26-0 but the defeat looked minimal compared the 112-0 thrashing the Rebels copped from the Queensland Reds.

Obst admitted she was nervous ahead of her first clash but the Uni-Norths Owls flyer said she wants to cement her spot in the starting XV.

"I came off the bench last week and it was a really tough game, they were very physical and they really brought it to us. But it’ll be good starting this week," Obst said.

"I don't think we should be taking this game very lightly, I think they’re actually quite a strong team and we’ll have to give them everything we have to win that game.

"I’m a little bit nervous but I just want to get out there and give it everything I’ve got and hopefully we give them a good run for their money.

"I pride myself on my ball skills and communication and getting the forwards where they need to go and lining up the backline and getting everyone set."

Obst is one of four changes with Wallaroos prop Violeta Tupuola, halfback Remi Wilton and winger Biola Dawa.

Butt said there would be "no catching" Dawa if she finds space and emphasised the team pass mark is still to play finals, which means they'll need to win their three remaining games.

"Our goals are still to make the finals and from there, anything can happen. We’ll just take each week as it comes and this week we need to win," Butt said.

SUPER W ROUND TWO

Sunday: ACT Brumbies v Melbourne Rebels at Seiffert Oval, 3pm.

Brumbies: 1. Violeta Tupuola 2. Louise Burrows 3. Peta Cox 4. Emily Sogal 5. Shellie Millward (c) 6. Michaela Leonard 7. Georgia O'Neill 8. Tayla Stanford 9. Remi Wilton 10. Claudia Obst 11. Brooke Gilroy 12. Sammie Wood 13. Michelle Perry 14. Biola Dawa 15. Rachael Crothers

Reserves: 16. Harriet Elleman 17. Stephanie Stewart-Jones 18. Paige Penning 19. Grace Kemp 20. Irene Macarthur 21. Jane Garraway 22. Emily McDonald 23. Darcy Read