You can’t have that on a ring. The only rings with + to skills are Stone of Jordan and Bul-Kathos’ Wedding Band.
Rare and magic rings cannot roll any type of +skills.
Closest to what you listed is a rare ring with:
10% Faster Cast Rate
+11 to All Resistances (11 is the max on a rare ring, can’t get 12)
+15% Better Chance of Getting Magic Items (you can actually get up to 25 magic find on a rare ring, but you have to combine a prefix and suffix. 10% from just the prefix or 15% from just the suffix is considerably more likely than the two together)
+40 Life
You’d actually have room for a few more mods than this, a rare ring can have up to 3 prefixes and 3 suffixes. So you could have something like:
10% Faster Cast Rate
All Resistances +11
+25% Better Chance of Getting Magic Items
+40 Life
+90 Mana
or
10% Faster Cast Rate
+11 Cold/Lightning/Poison Resist
+41 Fire Resist
+25% Better Chance of Getting Magic Items
+40 to Life
or
10% Faster Cast Rate
All Resistances +11
+10% Better Chance of Getting Magic Items
+20 to Strength
+40 to Life
+90 to Mana
Oh, and good luck finding a rare ring like any of these.
At a certain point you run out of top tier prefixes. Like I said, only up to 3 prefixes and 3 suffixes. Your choices for prefixes are attack rating, mana, stamina, cold res, fire res, lightning res, poison res, all res, mana after kill, magic find, light radius. Pick 3.
All res and magic find are the two obvious choices. After that, your best options for the third prefix come down to mana or a single res in my mind.