BLM itemization in 5.4 is a problem.

[CKNovel]

-5 vit is pretty huge in hc ultimate prog though.

I know the calculations behind the vitality stat is a bit tricky, but if you use a vitality potion (12 vitality), you'll get around 265 Max HP.

1 vitality should be around 22 Max HP.

5 vitality should be 110 Max HP so a net 0.08% increase.

On the opposite if HP Materia were still a thing, one slot should give around 40 vitality, considering Vitality VI gave 25 vitality. 40 vitality should be around 880 Max HP. Per slots. Which would be a 10k HP increase on left side alone.

5 vitality is a drop in a lake, if your healers need that 110 Max HP, you may want to remap your group mitigation.