Forget Cooper Cronk's four try-assist night, Craig Bellamy's main delight is his purple wall has been restored just in time for the pointy end of the season.

While his diminutive halfback cast a familiar spell over a powerless Tigers at Campbelltown Sports Stadium on Monday night, Bellamy only had one statistic on his mind as the Storm climbed into equal fifth.

"Our defence has improved out of sight in the last four weeks," said Bellamy, whose side has only surrendered 34 points in its last four matches.

"Our stats were really down and I think Cameron [Smith] made the point a couple of times about our attitude to defence. That's certainly picked up the last month and to me that's been the big difference.

"There's still a long way to go. I'm a bit of a pessimist or a realist sometimes, we had an up-and-down first 17 weeks and we've shown a little bit more consistency the last month and we need to make sure we keep that going and not drop back into preparing differently each week and not performing like we should.

"We've got some improvement in us and we need to make sure we don't drop back into that inconsistent pattern of the first 17 weeks."

Added Smith: "Our commitment to keeping the opposition away from our tryline at the start of the year wasn't where it needed to be and now it is. The boys don't want anyone crossing their line. When you're doing that you're always going to be hard to beat no matter how well you're playing in attack."

Melbourne made light work of the Tigers after falling behind early, racing in 28 unanswered points either side of half-time to spoil the host side's Simon Dwyer tribute match.

Ex-Tiger Marika Koroibete bagged a first-half double, but it was Cronk who stole the show providing the final pass or kick for four of the visitors' five tries.

Bellamy said the Storm puppeteer had benefited from six weeks out during the State of Origin series after breaking his arm inside the first 10 minutes of the series opener.

"It's good that he had a bit of a break, but sometimes you lose a bit of rhythm and that game hardness when you have six weeks off," Bellamy said.

"It doesn't look like it's affected him at all. I keep saying each week he's so professional in how he prepares and how he looks after himself. There wouldn't have been anyone who would have come back in better nick or better mental state to play footy after six weeks out."