Tiger 320/737 and Virgin 737 was 98 combined in FY19. Widebody domestic capacity was equal to around 5 737s.
Pretty much the 104 quoted above.
I really don’t think you need to have an all out capacity war against Rex, and it’s what 5 737s, to remove it. Lack of scale will basically kill that operation. I mean it will probably go on for a bit, Tiger persisted 13 years with no earnings. Not sure if they have as much patience.