Just started 7/11. So no its quite possible to get it done before the event ends - but you have to go all way in. I skipped all manyu/dragon missions and focused mainly on the event.
Experimented a bit and it seems the ?-8 SG is the best possible outcome. You can easily get above 9K tickets.
Even though ?-8 itself is rather lackluster in comparison.
We still have few more days till the event ends and I expect to be able to get to 8/11 or even 9/11 maybe. Anything more qould require FGem refills which I dont deem worth it.