wearing any hp shell in my opinion is stupid, if you want extra HP put it into your stat points for the extra AC you will gain, and if you use undy at, there is some extra HP. then later if you need to tank something like towers, you can throw on all your HP shells if you felt like it. imo sell HP shell set and upgrade your uniques.
imo you are such a fuking tank at lvl 80 anways, and your never going to be soloing as a warrior that fuck the HP build and go AP whore on stats. kill the priest / mage faster = killing their support = killing them faster = keeping your party alive. 255 str rest hp. you will still have monsterous HP where the priest will have half a minute to realize to 10k heal you, and you could still survive.
lower lvls id go min str for wep rest hp.