I don't get why mages have so many health items?
and technically
because the of the aura.
I know immobile mages need some defense, but adding health to so many ap items just seems unimaginative and boring. Plus in most games, health is usually a tank stat, not a mage stat. If you look at ad items, there is a huge selection of defence items that don't use health.

all of this items don't have health, yet add defense in creative ways. The only items mages have similar are

Overall, ap items just seem to lack diversity and imagination.

(just because you consider mask a mage item) 
