Having time on type doesn't really matter that much as you will likely not be flying the A320 if you got hired anyway.
Where it will help you is on the matrix that determines who gets interviews.. It takes into account a multitude of things including time on transport category jets.
Good luck to all who have applied.
P.S. I don't think there is an upper end for age. After all, that would be age discrimination and as has been pounded into our heads on another thread, that is illegal in Canada.....