I've always wondered if it's redundant to add more malt to already malted flours. I have been doing it for a long time, albeit at extremely low levels.
In a home setting, no, I don't think it's redundant. It's all about the flour and how well the LDM works with it.
I suggest you play around with different LDM amounts or percentages and see what sticks. What works for me might not work for you. So keep experimenting until you get it right. But LDM is cheap and so is the Power flour, so no harm there.
Imho, the key to all this is what type of crust or style of pizza you'd like to achieve,...artisan, rustic, NY street, NY elite, classic Italian and so forth.
Poolish definitely adds some depth, texture, structure and character to the crust. Let's see how the final pies turn out. It's been awhile for me.
But the dough felt great and smelled good, as well. 75°F off the hook, 30 min bench rest then scaled. Four 340gr dough balls for NY Day,
As far as your quest for a lighter, more open and airy crumb structure is concerned, I'd ditch the AP flours and just go straight with the Power since it has an absorption rate of 65%, and then focus on the mixing and retardation times, as well as temperatures.
Imho, the key to all this is what type of crust or style of pizza you'd like to achieve,...artisan, rustic, NY street, NY elite, classic Italian and so forth.