To make my life easier, i'm just aiming to get my ass to 1k EF and 2k vit.
That said, for the jewel selection
Percentage scaling of any attributes only works best when you a good amount of said flat attribute to boot with
taking the jewels you've put in example
1) 10 EF - 3% Fire spell - 1% vit
2) 4% fire dmg - +10 vit jewel
assuming you have at least 1k FLAT vit (from base + other source of flat stat from gears/charm)
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1% of 1k vit = 10 vit
if you have yet to cap EF, jewel number 1 is better.
Percent fire spell damage would only matter more after capping 1k EF and 2k vit.