lol, does that put us over 9k hp at 120? lol
On a more serious note - I was thinking something that has a middle base value, and has some scaling mechanic with base vitality (not bonus, not % if that's possible).
So we have a little hp but nothing obsurd. probably bring us to 5-6kish at 105, but not so obsurd it scales every thing else. Seems nearly impossible to balance around late game while being useful early.
maybe even a buff that turns avoid > hp% but looses the avoid. since 12k+ hp alongside 60% avoid and free 50% dr is just way to high (dr can't be counted on for ranged though). would need to be an interesting scaling though, since avoid hits what 60+ sometimes? . . . .75% per avoid at the start would be what. 37.5% . . . . but the difficult with this is requiring perfect balance for the avoid to be required.
alternatively - something that gives vitality per dex/energy/str/vit placed.
the vitality per str/dex/vit (base not bonus)/energy (with x2 value on vitality), or +mo level in gear is probably the easiest to balance as it has a smoother scale. (the per vitality here, is to give a potential full vit build when doing purify ubers. but i haven't been there so not sure.). edit: it couldn't be as extreme as amazons gem scaling since our avoid numbers are kind of nutso. 60% avoid + 12k base hp is a little too strong. i'm thinking 7-9k just seems like a better value. IDK how i'd scale it though, outside adding a +vitality/flat hp % growth.