Rate vs Angle of climb
We were told to maintain a certain altitude by a certain waypoint. We were at managed speed (I'm on the A320) and we weren't able to do it. So I selected the speed and reduced it progressively by 5 knots each time to increase the rate of climb. My Captain suggested that we should go 275/.76M to achieve the best ROC. My idea was to reduce the speed progressively towards green dot to keep the rate of climb going so we get closer to the best angle of climb which gives us the best altitude within the least distance.
Which is correct way to go about this? Can't believe I'm asking such a basic question but yes I'm trying to get my head around it!
Thanks guys.