When the heal do some dps and can't instantly heal you. Sometime you take 16-17k damage (flame traits, mage's meteor, mantikora's body slam…) and die in a second with a dot or an another hit. With 18k, my teammate died a numerous of time in Sanctum or vet DSA, with 20k they often end with 2% of their life.
It's a commodity, with 18k you avoid os but not multi-hit. If you are good, you can avoid multi hit, but it's hard.
anitajoneb17_ESO wrote: »Bottom line is :
This question is impossible to answer as is, since it depends on :
- Your build (magicka ? stamina ?) and thus your armor type ;
- Your playstyle (melee ? range ? more a sniper or a dodger ? are you good at blocking at the right time and escaping the zones ?)
- Your class (some classes have more self-protection or self-heal than others)
- The type of content you want to run (PvP ? PvE ? Grouped ? solo ?) and the setup of the groups you run with (some trial groups run with 1 healer in which case you need more health, some groups run with 3 healers in which case you need more DPS thus less health)
- Your gear and glyphs, and associated mitigation and resistances
- Your champion points and where you spent them
- Your skill bar choices (bound armor ? siphoning spells ? self-heal capabilities ? or pure DPS burst ?) and associated passives
- Type of potions used
- Whether you need tri-stat food or just two-stat, or if you use drinks
Etc etc.
Given all these variables I believe that anything below 15K health is too low for PVE end game content and anything above 23K health is probably wasted. Dunno about PvP.
NB : do not listen too much to "advice" given by people who don't even ask you for more details about your build : they will tell you what works for them, and that might not work for you.
NB2 : don't make your build rely on pvp campaign buffs. These are unreliable and can disappear right in the middle of a raid. Happened to me more than once.