As many people who know how to use the hack stated so many times, coins not decrease is 100% safe.
Unless pushing inside a tournament and only untill you reach your MS, NEVER use hero and scroll weapon. The hard wall is easy to cross by using that and it will lead you into a ban.
Again, pushing beyond your personal hard wall, which is what the game consider to be your potential limit for the status you have, is ALWAYS dangerous. You may jump a few stages when not intended to, but getting used to it will get you banned in the first mistake you make - assuming that you actually know how the game calculate your potential and know what is your supposed MS for that.
The number of prestiges only matter when the events show within your clan the number of tokens you are getting everyday.
The only thing useful in your comment is to buy pets. They are more important than equipments for those who are pushing constantly. No one is seen within the late game with less than 3k pets, for instance. So people just need to check other clanmates in order to know how much they are looking for to make their data to look legit.