However, the former All Black is wary of the damage Sergio Parisse and his fellow back rowers could do in the showpiece match.
Leinster are through to both the Amlin and PRO12 finals after last four victories over Biarritz Olympique and Glasgow Warriors respectively but Nacewa insists they must take note of the warning signs.
"I think we just need to really get the breakdown right for the Amlin final," said Nacewa.
"So if we can clean up the breakdown area and get our basics right, we're in for a good game.
"We knew Glasgow were going to come at us and they really disrupted our ball, and it was a bit of the same last week against Ospreys too.
"But it is a great way to go off, with two finals. You work all year for this and there's no better way than to stay at the RDS for two more weeks."