Here is my solution for the banning problem.
First you have to have onw ios devices, and the other on doenst matter what brand it is.
We install the modded game in the device, the we use it until you get 350 gems, i recomend, yo can go up to 380 but its to risky.
When you get to that point, ith the same facebook account up the game in the non other devices and use those 380 or 350 gems again. Or simply eliminate the modded app an install the original.
Do not use more then 380/350 or you will get banned, i try multiple times in different ways, and this was the best one.