magic resist

we have a ton of dmg/magic resist item for AP or AD champs , supports but i feel like tanks dont have many options against AP like they do against AD vs i think we kinda need another hp/magic resist item of some sort, maybe a magic resist version of Sunfire cape or iceborn gauntlet, but it feels really dumb to play against a team where you need to build both magic res and armor but the AP one is super fed and even tho you already have spirit and Banshee, and sometimes even maw of the malmortius, you get popped like nothing happened