Just some suggestion here

I play both version of harem game. It's good when I'm new but when I play in arena a lot, rank go up. And now my Contests is impossible.
At first, I admit it's easy because people around you tend to leave their account a lot (low lv). Then it's competitive and fun, fight to the last few minutes.
Now I'm level 44, in Tower around me are level 70-90 and few 5x. Currently, 1st rank Contests is level 108!!, another is 87. Why Contests group based completely by Mojo (Tower rank), it should based on level instead. Look at the contest type donate,pachingo,give xp and fight the world troll. I can fight only Ninja spy while he can fight Gruntt. That lv 108 man even have low mojo/rank than mine. It is the trick to exploit this bad matching by inactive play something and keep free Koban every two days - that why he can have all harem.

Mojo seem to be penalty instead of benefit. I have no hope to beat level 108 which can get a lot of XP and he have double harem members than mine. Now that I know the trick it's good but it is no fun and unfair at all for whom don't know about it. 64 level gap is too huge :P Hope you guy can re-balance this for fun and fair contest.
You may give weekly Koban based on rank (may decrease low rank Contests prize to balance this give-away) to prevent these shrewd person to stay at low rank.