Took a week to make the second set. It is extremely easy to get the same rolls. Max quality and level and then just spam crystals. The crystal affixes are not the same, just the other affixes. This allows me to test how the build does with more resist, armor, luck, etc.
And it looks like you didn’t know but once you unlock an eternal item, you can craft it again all you want for a little dust
And to take you under the hood, here is me prepping another build. I get the base items ready and then obsidian slowly over time. Once I get the crystal affixes I want I do start crafting everything else.
Here is an old guide but still mostly useful for crafting