Originally Posted by Felaedor
Because he was comparing Ionic Spark and Wit's End, and by extension, HP and Resists.
When you compare HP and Resists, Resists tend to win heavily as the game progresses.
Context, context, context. It's not an absolute "HP sucks". It's a "there's something better on a VERY similar item".
That is not true. I was buying Spark exactly because it was giving health (and had nice effects too)
I see people have big misconception. Health is better if you have resistances. I mean. If you have just health, you can survive and tank some, but you will be killed fast. If you have just resistances you can survive heavy burst, but you fail to sustain damage. In order to really tank, tanks need to make both. Actually, in my opinion, reaching about 200 both, armor and magic resistance is maximum of actually useful resistances. Because if you focus and keep on making only resistances, enemy players will just make LW/VS and burst you because you have as much health as rest of your team.
Try to tank only with resistances and without making any health items. Soon enough you won't be able to tank at all.
Also, resistances have big weakness. Penetration. Magic and armor easily lower that effective health of armor/magic resistance, when health doesn't have that problem. Health is only lowered by damage, nothing else. So armor and magic resistance is helping in making health works better, but armor and magic resistance is weak without health to support them.
I'd kinda compare it to shield vs heal. While shield (resistances) give you temporary toughness, heal (health) give you constant toughness by restoring your health.