I mean absurd in terms of, holy balls, if you want to finish all of the missions in a day, that's like 5 to 6 hours of gameplay.
However, doing the math, playing one battle each day for the entirety of the event will net you with 2500 tickets through the initial 100 ticket missions. To achieve tier 5, you only need 500 more tickets, which is about 4 days worth of completing all of the additional rewards missions.
So if you can play one battle every day until the 29th, throwing in about 4 additional days worth of tortured and imbalanced grinding, you can unlock a pivotal piece of imbalance itself, the 85M!
Probably a shitpost, don't care much.
Update: played 52 games, got the tier 9 and 10 missions and 1 of the others, lost the will to live, transitioning into an arty/EBR shitlord
Update addition: haven't hated this game this much in a while