You are overgeared for coil. As was mentioned it is i70 to enter even turn 1, the event itself drops i90 gear (except for t5 which is i95), and there is now an immediate +20% echo on turns 1-5. The only thing that will stand in your way at this point is not playing your job well or struggling with mechanics, many of which are a lot less painful or can be ignored especially with the echo. Turn 5 is a significant difficulty increase so don't get too stressed out if you get stuck on it.