But Dusautoir was powered over from a close-range line-out to break the visitors' resistance.
He needs to be challenged in the line-out and smacked backwards in the loose.
Things got worse when the resulting line-out lead to Foster's try to make it 34-12.
Wales have also worked hard on the scrum, line-out, communication and getting over the gain line.
Mercier replied to Strange's opening penalties before Forrester was bundled over from a line-out drive.
BBC: SPORT | Rugby Union | English | Bristol 9-41 Gloucester
Wales became penned back in their own half because of their other Achilles' heel - the line-out.
Leicester won the resulting line-out and Moody emerged from a pile of bodies to claim the try.
When captain Steve Borthwick was caught offside running straight through a line-out, Giteau duly doubled the visitors' lead.
The Scottish line-out, particularly, was creaking and under-fire coach Frank Hadden replaced White with the fit-again Nathan Hines.
"Quality possession from scrum and line-out will go both ways, both teams have good players there, " he said.
Richards took a quick tap penalty after a Dragons line-out mistake, feeding Armitage who chipped over the top.
So we've got to go forward in the scrums but also be able to win quality line-out ball.
Parisse then scored his first try of the match on 49 minutes, breaking from the tail of a line-out.
However, with a minute left the Emerging Boks kicked a penalty to the corner and won the resulting line-out.
And from the subsequent line-out, England number eight Easter cruised through a gap in the defensive line to score.
Turnbull was again involved, stealing a line-out that allowed the ball to be punted deep into the unmanned Perpignan 22.
Quins went further ahead went from another penalty touch, Care taking the line-out flick to burst through under the posts.
But a minute from the break, Rocky Elsom stole ball at a Springboks line-out and stormed into the Boks' 22.
Lock Victor Matfield , who won the man-of-the-match award for an outstanding display in the line-out, hailed an emotional victory.
And while the scrum and line-out worked well in the first-half they lacked the cutting edge of their Welsh opponents.
New Zealand were next to break, taking a quick line-out to send debutant Zac Guildford away down the left wing.
They saw what was happening at the line-out and decided to throw it over the top and race for it.
Scrum-half Farrell received the ball from a line-out just outside the Swansea 22 and scythed through the All Whites pack untouched.
Fly-half Adrian Jarvis missed the conversion but slotted a penalty as Sale, whose line-out was misfiring, struggled to find their game.
Flanker Johnson was driven over in the corner after 43 minutes as Exeter's pack again surged forward from an attacking line-out.
That score was wiped out by Lipman, who was sent clear by Jonny Faamatuainu after some neat work at a line-out.
King punted the penalty to touch, and Ibanez and Simon Shaw caught Leicester napping again for Wasps' second try from the line-out.
"We struggled at the set pieces - scrum and line-out, " said Lineen.
The line-out improved with Nathan Hines and Worsley both claiming a couple of takes apiece, and gradually the tourists found some cohesion.
Booth told BBC Radio Berkshire he is concerned with the line-out changes.
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