Alapt,
No DEC's at Jazz.Upgrades strictly by seniority.
Figure around 8 years for an upgrade in YYZ or YUL.
I believe captain's at about 100,000$ per year more or less.
I am not at Jazz but have lot's of friends there.Most are happy.
They have been hiring for at least a couple of years now.
Westjet and AC are also hiring a lot of pilots.
Good luck