Mumford received the latest two-match rough conduct ban for a heavy tackle that concussed Carlton midfielder David Ellard.
It was similar to the tackle on then-Geelong midfielder Gary Ablett last year that also saw the big Swan sidelined for two weeks.
In Mumford's absence in the last fortnight the Swans have lost against Collingwood and Adelaide to slip to seventh spot on the ladder.
"If you take someone to ground in a tackle you are risking suspension," a reformed Mumford said on Thursday.
"I've been working on it for the past couple of weeks now to basically try to pin blokes' arms so they can't get rid of the ball while still standing up.
"The best idea is to try and hold them up and not take that risk."
Swans coach John Longmire said both he and Mumford understood the big man needed to change his technique.
"We want him to lay effective tackles but he knows that the game is telling him he needs to change his style," Longmire said.
But come Saturday, the Swans will be throwing everything they have at neutralising the threat of the Suns and their captain Ablett, who is in scintillating form.
Kieren Jack and Ryan O'Keefe are two options to get the job on the Brownlow medallist.
"I might have to walk out with a block of wood just before the game and I might say, 'Gary, if you get too many touches I'm going to jump out of the coaches box,'" Longmire said.
"In the end, good players get the ball, whether that's Chris Judd or Gary Ablett, good players get the footy.
"So what you've got to do is to make sure you minimise the effectiveness that they use that ball with and that's what we'll try and do, just minimise his effectiveness."
- AAP
Tags: sport, australian-football-league, australia, nsw, sydney-2000