Good advice!
Personally I wouldn't bother upgrading armor at all though.
Also, which ADP is nice, I'd say VIT is most important, especially early on. More iframes in your roll from ADP is good, but if you're fat rolling because of low VIT then it's irrelevant. Soft cap for VIT is 29.
With the fat roll thresh hold being 70% now I didn't find myself putting anything into vit until I wash at the castle. I wore light armour for the most part anyway as poise is/was broken at the time so heavy armour Felt kinda pointless.
I do agree with upgrading armour though, don't think I've done it more than twice in about 500 hours with souls games .