IMO the mystic tier is bugged, I played it for nearly 4 hours with a team (GK lead, Zarriss, hermit yoda, grand master yoda, and Ezra) that my guild mates said it was easy for them to beat it. (One on his 1st go and another one beat it a dozen times, keep retreating to get better screen shots) while myself and my team which was equal to theirs in gear lvl and much greater in terms on mods arena lvl +93 speed to +110 speed on all my hero’s and I was only able to kill GG 3 times in hundreds of battles and only beat wave 4 once and still couldn’t beat it. I have other guild mates having the same issues as it having. Pretty sure some accounts got an easier mystic event and others got a much much harder one. Is there any way I can prove this, no, but my hundreds of attempts with a better team then they used and can’t even come close is proof enough for me.