I think Juventus should push for a win. They don't have much to lose now. All they can do is achieve a better position in the league. Lazio are not doing that good either and comparing their form this season, Juventus is still doing better by far. Lazio has lost 3 of their last 5 matches, while Juventus has lost 1. I know these does not say much but Juventus is still doing much better than Lazio.
If we take a look at their previous matchup this season, Juventus actually won in a convincingly way. They scoreline was 3-1 in favor of Juventus. Nevertheless, Lazio is not a weak team, but there form has been too bad in this season. But they might win if Juventus plays too risky.
You are right, Juventus looks better based on recent performance but Lazio can take advantage of the opportunity to play at home and winning the last match can increase their confidence so overall I think this match is 50:50 I mean, have the same opportunities. The difference is that Juventus wants to maintain their position in the top 4 of the standings while Lazio does not have any targets they were eliminated from the race for Europa League tickets, I think this match will end in a draw unless one of them gets lucky.
I think the possibility of Juventus winning this match is quite high. Lazio is playing exceptionally poorly, not being straight at home in the last 4 matches. With what Juventus is showing, perhaps defeat is inevitable for Lazio. In addition to the race to win tickets to the Champions League next season, they need to try to win a title, and Coppa Italia is the "salvage" for both. This match is considered a "practice" for the more critical confrontation a few days later: the semi-final first leg of the Coppa Italia.