the parks in italy are poor, chamonix is likely to have a good park and it is close
Val d'Isere has a good park, some good kickers there, rails are good, good atmosphere and there is a short drag lift to take you back up. The pipe there is shit, faces the wrong direction, in the afternoon one side is icy and the other is slush. tignes has a good pipe and a good park.
Val park tends to be closed till about 12 tho. swiss alpes are a long way from italy, verbier and zermatt are likely to be pretty good