I almost never go into games with double healers even in competitive. It's always 3 DPS, 2 tanks and a healer. I'd include Junkrat/Mei as "DPS". It doesnt do too badly because I feel like an extra DPS in console is okay because being a healer in a DPS-centric meta is terrifying and sometimes puts you at a disadvantage. That's why I feel like Zenyatta is just a must pick as he acts as DPS and healing.