When you make a new knight you have 5 health.
If you have a lv.10 vog cub set (each piece has a +5 health bonus) you should have 15 health.
If you have a lv.10 vog cub set & a tri-heart pendant, you should have 19 health, right?
Well I have all that yet start with only 15 health. I'm confused.
Ah. I didn't think there was a tier cap on health too -w-; nevermind.
Yeah, health bonuses seem to be nerfed depending on tier. It's incredibly confusing and not explained in the item tooltip.
http://wiki.spiralknights.com/Clockworks
Go here and look at "Equipment Reduction".That should clear up your questions.
Did you look at that in t3?