I noticed ever since Buildasoil's los mix and 2.0 mix was made that people are trying to incorporate it into their procedure..IMO there's way too much stuff in there to begin with.
You already have 11 items that will get you through a grow no problem. None of the amendments listed above the ones you have would add any special elemental value to your soil.
Things I would definitely add would be minerals:
-Gypsum
-Basalt
I'd try going light in your initial mix and topdressing throughout your cycle to raise your ec. Much easier and safer way of doing things.
^^^^THAT^^^^
But, I am going to add a few points that will hopefully save you some $$$ and more importantly, time. If observant, you will figure this out on your own, but it can take years for some things to become obvious, over several grow seasons and trying different things.
I've been making my own mix, from scratch, for better than 45 years. But, I've only been doing organics for the last 8 years or so. The basic mix has stayed constant throughout, but the amendments started out simple (6 or so), got "busy" (much like your 'to get' list), and have evolved back to 6 or so. The "busy" part lasted 3 or 4 years as stuff was eliminated as not needed, or, already covered by locally sourced items. There are only 2 amendments I use that require shipping (kelp meal and neem cake), everything else is sourced locally.
Minerals: Very much needed, but shipping rocks is about as silly as it sounds, especially when you are already covered with something you have and I don't mean the Azomite.
Kelp meal provides ALL the minerals and trace elements needed and usually more than any rock dust. The problem is cost. The whole deal with rock dust was with fields that were depleted of minerals and such (agriculture). If you had say, 40 acres that needed to be re-mineralized, the cost of that much kelp meal is prohibitive. Rock dust is only a few dollars a ton and works almost as well. For us (horticulture), in container mixes, with much smaller amounts used, the kelp shines.
BTW, for comparison, locally, Granite meal cost $5 for ~75lbs. ~$0.08/lb. No idea about BaS cost + shipping.
Bottom line, till you can find some RD locally, the kelp meal has you covered. The Azomite is just a plus.
Gypsum is easily sourced locally at just about any garden shop, or Lowes/HD. Cost is ~$12 for a 40lb bag.
Bio Char; A ~$8 bag of lump charcoal (cowboy charcoal), and some crushing on your part makes for cheap biochar.
Aeration: I would REALLY suggest you pass on the rocks and use perlite, at least till you gain some experience. Aeration is sooooo important (*I* run close to 50% total aeration) and using unsized, ungraded rocks because Coot said so usually ends up as a too dense and poor draining mix that the plants suffer in.
For me, this is a way worse problem than the 'kitchen sink' amendment list. Even very well amended mud is still mud and very little grows well in mud besides rice and crawdads.
Enough blathering for now.