Everyone in my LS refuses to answer this question ever since putting it to light that there is a ridiculous minimum HP to survive T11 and T12. I was told to go for one of the new platinum rings. Either Vit ring with Mind IV materia meld or Mind ring with Vit IV materia meld. Right now I sit at ilv120 SCH so I've been trying to determine which ring would be better suited for statistical advantage for both surviving and keeping my healing where it needs to be.