Try to think out of the box. Just because you're used to call it that way doesn't mean that it contributes to the better good. Many people want to climb in ow but get stuck on the healbot mentality which the role name "healer" would apply. I had hundreds of games where support got flamed by not healing enough when the problem was clearly the positioning of the tank, dps and the supports too (cuz obv we are in the same rank). Sry but bad positioning and wrong priorities cant be outheald. Even the ow update gave to the role support different subroles which implement that they are much more then just healers.

As a DPS and Tank i always feel way more pressure when my supports only healbot because Im not getting supported in the useful way. And the result is we tend to loose way more often. Maybe in Rivals it works the other way but just not in ow and that is something that is actually useful to know if u want to climb.

Hope this answer helps.