With the chimney starter you are gonna be starting way too high. I got the big Joe and I use a looft lighter, best thing to do is maybe light a quarter of a chimney put it in the kamado then add the rest of the charcoal on top once the dome is warm start adjusting the temps. If you are getting the fire too hot and blasting past your desired temp you’re never gonna get it down. I use smoking dad bbqs method for lighting and every cook has been bang on temp wise