Weird, you have 25 more Paragon than I do yet I would class all of my equipped items as at least ‘good’. Some I would consider ‘very good’. None are perfect.
I also don’t think I have bricked any item, definitely none worth remembering. 3GA items get 16 Temper rolls (or is it 18 if you include the initial rolls which don’t cost Temper attempts?). I know when using the scroll it went up to 8. You also get to keep whatever you have, so if you at least hit 1 you only need to hit the other one.
To be fair, the better your equipped items the more likely you are to ‘brick’ because it’s harder to improve the Tempers and if you don’t the GAs likely won’t make up for it. Also some builds use more or less uniques, which changes how much you rely on Tempering.
I suspect your idea of ‘good’ aligns more closely with my idea of ‘very good’ or ‘excellent’ though. I’d class anything with 1 GA, 3/3 Affixes and 2/2 Tempers as ‘good’. Add another GA and good rolls on Tempers - very Good. After that we are looking at ‘close to perfection’ which is indeed hard to get. Rightly so, I think.