Hmm...Im afraid this isnt a perfect ring for rogues, the oss of str is quite "heavy" and using blood gems doesnt give Dmg...
The only combination that can save the cons, would be a full 3x eye gemed mythic ring. Since it would be at least 9STR so that means 90HP...
Also, what ring were you previously using and how much hp did you have? How much hp did you loose and how much dmg did you gain?
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