Already got slightly over 3K, with the event running for 5 more days, I think its fairly manageable (unless they pop in random maintenance like they did at this very moment). If you get those ticket SG spawns at least twice per full stamina rotation in the morning, You shoul be able to bang out around 300-400 tickets no problem.

Then again, Waiting badly for one stupid Pierce lvl100 dragon to evolve my Mei, sighh