New Tanks Items Suggestions

Titansfist - 45 Armor 45 Magic Resist 20% Life Steal

Passive - Everytime you are hit you gain 1 stack from minions 3 from champions (at 100 stacks you unleash a shockwave (shortrange (PBAOE) deal true damage divided by half of your armor + magic resist + 1.5 second stun so "math time"

let say you have 200 armor and 200 magic resist right these means you deal 200 true damage pbaoe (thats melee range on your next auto attack)

now if your armor is 300 and your magic resist is 160. you deal 80-150 true damage magic resist sense it was the lowiest value see how it works? either

now this could be strong... as a last item but at start game most you do with is low true damage