To all these people complaining that it takes too long...yes it takes a long time. But the rewards are also much greater.

It takes around 30 mins per 'match'. However, you literally get hundreds of coupons for every win you get; assuming you get just 4 wins I believe you get ~200 coupons, and people who win around 6 matches can get nearly a thousand coupons. Considering zenith is much more heavily geared towards skill and strategy than just power and money, this is one of the few events that rewards skilled players with a lot of coupons. And besides, its not like this is for every week, this is just 5 days in the last week of the month. Just do your dailies early in this week, so that you can set aside 1-2 hours before sage and after kyuubi/cat quiz to do this event.