Otherwise, you could, instead of a merge, use a page of labels with six SEQ fields set for different sequences and with an interval of 6. The first page would be your initial set of fields with numbering 1, 35, 69, 103, 137, and 171.
The first field would be { SEQ Ticket1 /r 1 /# "0000" }.
The second would be { SEQ Ticket2 /r 35 /# "0000" }
and so forth.
Remember that the { } braces for fields cannot be typed. They must be inserted by Word using Insert > QuickParts > Field or Ctrl-F9.

Labels are Word Tables.
Create your first page, what you are using for a merge page now. Use the six SEQ fields instead of the Mail Merge field.
Copy the entire table on the first page and paste it creating a second page.
On the second page press Alt-F9 to toggle display of field codes.
Change the fields to drop the /r switch, i.e.
The first field on the second page would be { SEQ Ticket1 /# "0000" }.
The second would be { SEQ Ticket2 /# "0000" }
and so forth.
Press Alt-F9 again to toggle back to field results.

Then copy that page and paste until you have a total of 34 pages of tickets.
Press Ctrl-A to select the entire document and press F9 to update the fields.
You should have 2004 tickets numbered so you can cut them in sequential stacks.
That is, the top stack would be numbered 1-34, the second stack numbered 35-68, and so forth. After you cut them, you can put the first set on top of the second, on top of the third...

For larger numbers, increase the interval between each sequence and use that number of pages. What I suggested is based on 34 pages of 6 so the interval is 34. For each additional page of 6 you would increase that interval between the starting numbers by one.

See Insert and Format Field Codes in Word
Remember that the { } braces for fields cannot be typed. They must be inserted by Word using Insert > Field or Ctrl-F9.

For more about Numbering in Microsoft Word