Is grade V mind materia useful in anything?

[Claire_Pendragon]

If you use normal quality crafted gear you can use main stat materia to make it almost-as-good as high quality. That's the only legit use for it unless you are a tank.

This is true, but as someone else mentioned, getting VIT accessories, and adding primary stats to them. This used to be very common for healers in PvP back in 2.1, idk about now, as i dont PvP, but maybe this still applies, as having enough HP to live through some stuff really helps, but then again, it might be better to heal more.