Cleopatra:
You do realize, that Ana can reach 90 hp/s, and can increase it to 135 hp/s temporary, when she uses her nade together with her rifle?
Yes, ana has better burst heal. Her heal is anything but sustainable though. Let me refer you to this.
Yeah I’ve tried explaining this to plenty of people who think Ana Outheals Mercy and it’s just “bad players”. On paper you’re right, she should have the highest healing, but theory isn’t always great in practice. You can play like a god on Ana and a decent Mercy will still out heal her. Mercy can heal through barriers, doesn’t need line of sight all the time, and can heal and escape flankers at the same time.
On the other side, Ana players need the mechanical skill to actually hit their shots, they need to deal with rate of fire and reload, they need great positioning that isn’t obstructed by barriers and has complete line of sight, they have reduced movement when hard scoped and quick-scoping is designed with a delay that makes her healing per second worse, she has to deal with projectile speed if she’s not scoping at all, and any amount of pressure can stop healing all together because Ana needs to actually dual her flankers more often than not.
Edit: I shouldn’t say anything but sustainable. It can work, but when the direct competitor for main heals has the best healing on average, the best ability and the best escape, why put your team at that disadvantage.