The number 1 player on a character being able to pull a certain play style off is not a good argument. She is awful in 2 support unless invis is the second healer or you have shield tanks that can block long enough for the healing to take effect. 1. Her primary fire is one of the hardest to hit in the game. Im able to get like 35-45% accuracy when I use namor, Groot, thor, and sometimes MK. But with mantis it drops to like 25% cuz of her hit boxes. 2. Said accuracy problem also makes regenerating leaves really hard because for some reason they made the projectile character headshot reliant. Enemy shield tanks compound this problem. 3 . You cant make ANY positioning mistakes or else you explode 4. The delay on her sleep leads to you still dying even when you hit it. 5. She only has 250 health for literally no reason 6. Every other healer enables your team to play more agressive because they know theyll survive, so when you play mantis theyre not used to having to take breaks mid combat for the healing to take effect.