Given those exploits, Pivac insists none of the region's returning Wales stars can expect a guaranteed starting berth but the fiercest competition for places could be for the nine and ten jerseys.
Aled Davies and Steven Shingler occupied those roles against Leinster ahead of Welsh international Gareth Davies and Rhys Priestland but Pivac insists he has full confidence in whatever pairing he selects to face Edinburgh on Saturday.
"It is a good position for us to be in to have that choice - they are good headaches to have," Pivac told the South Wales Evening Post.
"You look at Gareth Davies, he has had a serious knee injury, has come back and it has taken a bit of time at our level to find his feet.
"He was getting half-games to start but then we had a big game against Leinster and we went with what we believed at the time was our most consistent player in attack and defence, with the ability to bring Gareth into the game.
"I think the fact he has got on the field for Wales will do his confidence the world of good. We are looking forward to that confidence coming back into our camp and it will be nice to be able to use him over the coming weeks.
"We know what Rhys can do, he is a very strong player, while Steven Shingler has got a great kicking average and is scoring a lot of points for us and we believe he is growing as a player."
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