Phillips has made two changes to the starting line-up with Elinor Snowsill starting at 10 and Alisha Butchers slotting back into the back row at blindside flanker.
Phillips said, “We want to capitalise on the confidence we’ve gained from the win over Scotland.
“We’ve shown a huge amount of character throughout this tournament – to hold Italy out at the end of that game and to come back from behind to win in Scotland showed remarkable attitude – and skill for such a young side.
“Despite that, I don’t feel we have shown how good a side we are and we’d like to do that on Sunday.
“Ireland are in a similar place as us. They played well against France last weekend. They have a strong back row and players who can make a difference. We certainly won’t be under-estimating them.
“However, we want to focus on ourselves, show what we can do with the ball and produce a better all-round performance. We’ve got a big match in us and hopefully we can showcase that on Sunday.”
Wales Women V Ireland (Sunday 17 March, 1.30pm, Cardiff Arms Park). Tickets available to print at home from www.cardiffblues.com/tickets and from 10am Sunday at the WRU shop, Westgate Street:
Lauren Smyth (Ospreys); Jasmine Joyce (Scarlets), Hannah Jones (Scarlets), Lleucu George (Scarlets), Jess Kavanagh (RGC); Elinor Snowsill (Bristol Bears), Keira Bevan (Ospreys); Caryl Thomas (Dragons), Carys Phillips (capt, Ospreys), Amy Evans (Ospreys), Gwen Crabb (Ospreys), Mel Clay (Ospreys), Alisha Butchers (Scarlets), Bethan Lewis (Dragons) Siwan Lillicrap (Ospreys)
Kelsey Jones (Ospreys), Cara Hope (Ospreys), Cerys Hale (Dragons), Alex Callender (Scarlets), Manon Johnes (Cardiff Blues), Ffion Lewis (Scarlets), Robyn Wilkins (Blues), Lisa Neumann (RGC)