The planned industrial action may well play into management hands. With the busiest time of the year approaching, and a lot of crew on maximum hours, plus the shortage of crew, the company may not be able to crew the required flights anyway. Industrial action would get them neatly off the hook.
Quite a few year ago Ansett F/A's went on strike, Bob Ansett offered some good deals on air freight, and filled the aircraft with parcels rather then people. It all looked like it would come unstuck when the F/A's called off their industrial action early and Bob still had a couple of days air freight to shift. So he goes on television and calls them "a bunch of old broilers", the F/A's oblige with another two days on strike, and Bob was able to clear the backlog of freight.
Be wary of management manipulation. Good luck with your action.