If you aren't turning necks to a uniform thickness, I don't see any benefit to using bushing dies. The bushing is just going to push any eccentricity in neck diameter to the inside of the case. And we all know how inconsistent neck tension screws with velocity swings and ultimately translates to poor accuracy at distance. So, I just don't bother with bushing neck dies unless the benefit of dialing in a specific amount of neck tension can be realized.
Also, when I do run a bushing die, I remove the expander ball so whatever neck tension the bushing allows for will stay consistent. Removing the expander ball will also reduce runout, since there is nothing pulling back through those pretty necks on the upstroke.
If I don't turn necks, I simply run a standard FL die...a Redding with optional floating carbide expander ball. Don't have to lube the inside case necks with a carbide floater, and runout is reduced, thanks to the ball being able to self center. And I also have case mic gauges for almost every caliber I reload for, so I can set the FL die to bump the shoulder back a minimal .002" for bolt guns, so as not to over work the brass and negate the risk of excessive headspace due to bumping too far...
As for trimming, I use a cheapo RCBS Trim Pro. And I only ever trim brass after firing 1x. In effect, I'm "fireforming" new brass to that particular rifle! And once that virgin brass is fired in a rifle, you can tailor your reloading procedure to fit that rifle...an important aspect of making consistent ammo.
Annealing? Usually after 3x fired. I spin cases with a cordless screw gun and an appropriately sized socket to hold each case. I anneal in a dark room and spin the cases necks in a Bernzomatic. until the necks just begin to glow a faint red. That's plenty...
Load testing?
I shoot a ladder of single loads, stepped with increasing charges of ~10% of the case capacity. IE, <30 gr capacity, 0.3gr steps. 30>50, 0.5 gr steps. Etc...
Shoot ladder@200yds min, 300 is better. The further the distance, the better you'll be able to see vertical dispersion between shots of your ladder string. Shoot through a chrono, if you can. When increasing charge weights do not net consistent velocity gains, you are topping out on the pressure threshold of that case/powder. And of course, always pay attention to the obvious pressure signs!
If you can, start with seating bullets in the lands for your ladder testing. So, if you choose to back off the lands later on, you won't see unexpected pressure signs. Going from a jam to a jump will lower pressure....until you begin crunching powder by seating too deep! Then pressure will actually increase since the bullet is now displacing case volume. But going from a jam to a small jump will LOWER pressure. Safety first!
As you shoot, the increasing charge weights in the ladder will hit consecutively higher on target. What you are looking for is where a cluster of charge weights are more closely stacked, vertically, than the rest of the ladder. Those 'flat spots' in the vertical spread of the ladder is what you want to see!
If you've found where your vertical dispersion is clustered, the middle of those charge weights would be where you'd want to focus on to test some groups with. The smaller vertical spread at distance directly translates into being in the "sweet spot" for your particular rifle. That target don't lie!
Above all, be safe and have fun! Finding that killer load is a great feeling...
And sorry for the edits, can't type on this iPad!