Hello,
Maybe i can try to help you, understanding better the season tickets holders.
In my own opinion, i think they exist to give us a "clue", to the maximum arena capacity.
Following this ideia, and my own experience, we can assume that it represents between 15 and 20% of the maximum number of seats you can have in your arena.
So if you have 1.405 season tickets holders, your total arena seats should be around 8.780.
Then, you have to brake down that number, in the various types of seats, something around this:
Bleachers (83%), Lower Tier (13,5%), Courtside Seats (3,25%), Luxury Boxes (0,25%)
Best regards.