Crafting question

Hello, and thank you for any help you can give.

If I want to make a Caster Ring:
10% Faster cast-(5)
11% All Resist-(56)
15 Strength-(55)
15% Magic Find-(12)

When items list a Level Requirement, the number listed is 75% of the highest prefix or suffix level

so would a lvl 42 character be the ideal lvl to get the above mentioned If I used a dropped Hell difficulty lvl 85 area ring?

I was looking for a ideal lvl to lower the prefix/suffix odds.

I know it’s probably 1 in a Billion to hit this but just wanted to start off on the right path and I suck at math >.<

Thanks again for reading this.

I’m no expert, and might be wrong here, but my understanding is that the crafted ilvl is 0.5* character level + 0.5* ilvl of the ring in the recepie.
You want that ilvl to be at least as much as the highest ilvl requirement for the affix you want. In your case 56.
But also… at ilvl71 and above, there is a 100% chance of getting 4 random affixes on your craft other than the predetermined ones. Anything below than that, there is a chance you get less than 4 affixes. So I’d say you want to aim the ilvl to 71, so you need to use a lvl 57 character with the lvl85 ring for the best chance.
Then again, I just put these together from vids and the wiki, might be wrong.