I think you have misunderstood what I was saying...
Looking at your graph, I see a large mountain of blue, where the servo damper is nearly fully open most of the time running at a low temperature of 250. IMHO it would be better to have your air flow setup to achieve that result while the HM is displaying more like 35-50% rather than almost all the way open.
There are a couple ways you could go about addressing that.
First stop would be the top vent... If it is choked down like you need to do with a HM when you do not have a servo damper, then open up the top vent and let your pit breathe a little bit more. You should notice that the more you open the top vent the more the HM will close the bottom vent.
Second thing you could do is disable the "on at max only" option for the blower and let the blower take a more active role. This is how I tend to do it with my bullet smoker running the air burner. This method uses the blower to create those little air jets that very effectively stoke the fire.
Another way would be to make more holes, or larger holes, or add cross members with additional holes to your air burner... Right now you've got just enough holes to hit about 225 wide open....
So you could use the active (blower) method to deliver more air or use the passive method and provide a wider path for air to flow (more/bigger holes, wider top vent)
If you go with the active method (the easiest obviously because you just have to change software settings) then you would want to turn OFF the "on at Max Only" option and set your MAX blower speed to something less than 100%. What speed depends on your pit, I would guess something around 30% would be a good starting point. You can leave the Startup Max to 100% so you can still start the pit with a tiny burning twig! LOL I usually use 1/2 of a Weber starter cube to light my fires....