So recently I've been trying the domed screen method. I took a standard SS pipe screen and trimmed it down a bit so that it will fit in the stem if you bend the ends down. This makes a metal dome, like a slice of a sphere, inside the base of the bowl.
I think the dome makes it easier to load a smaller bowl -- enjoying the suction methid recently -- and also promotes a more even airflow over the bud.
No stirring, no screen on top, very light tamp, rotate a bit between hits. Usually cool on 360-370 F for a few hits (5min?) then finishing on 390 F, 15 min cycle. I used to reboot but not now. ABV is kinda mid-dark brown (I see some people getting really dark brown, almost black, but I've never approached that) pretty consistently.