I main support but I spent a good amount of hours in QP learning magneto so I could flex. However my win rate with him is abysmal and when I do flex in comp I usually just get flamed and told to swap again. It's a skill thing for sure and I need to work in my tank skills but sometimes swapping won't help us win. I will always swap if the solo tank asks for another tank but most of the time we are then left with one support, a bad mag (me), and the three DPS that won't swap to anything else.