A few tips.

Players can get a Ex-Wild each day from 100 daily wins.
It seem only my offensive attacks count when calculating number of daily wins so puddings is needed for 100 daily wins.
I suggest only spanding pudding until you got your 100 daily wins and save rest of pudding to next day so you can get one ex-wild each day.

I will suggest combining using coliseum tickes and get-SR-Girl quests for more reward.
The 2 SR-girls from last box count for the get-3-SR-Girls quest and for get-1-SR-Girl quest.
So I will wait spening my tickkets untill I got 1000+ tickets so I am cetain to finish the get-3-SR-Girl quest for an extra Ex-Wild.
When I have finish the get-3-SR-Gilrs I will save rest of the ticket for the next day unless it is last day of event.

Maybe maxing the 2 R-girls from event will give even more R-Gachas when they are drawn from box - I need to test.