I dunno, I got blitzmon after 400 gsp tickets (blb). While gsp may seem harder to get, it is moslty due to them being slower to farm than other tickets (tower, fe, fp).
So I think depends on your gatcha. But if you ask me, deltamon was a bitch to me. I had to spent almost 600 or more free tickets to get him, he was the only digi i didn't have blb from free.