To all, if you don't want to get Banned, use mod Damage x2, defence x7... I used like this and everything is alright.
I get Banned 2 months ago because I used mod at maximum, never again. I explained that my phone is rooted and I use my phone for my work. They believed and remove the ban, since then I only use damage max x3 and defence x7 (don't think defence has any issues, damage yes, have massive impact in log battle, I suppose).
As long you upgrade your heroes you can easily pass anything with damage x2.
Peace