Suggest referring to your...
Suggest referring to your FCTM or other appropriate publication.
Airbus also publishes Getting to Grips with Aircraft Performance.
This is a great reference manual....will answer most of your performance
questions.
John T is exactly correct, as usual.
In reality, your best angle of climb in the takeoff config...one engine inoperative...is around V2 plus maybe 10 to 15 knots....depending on this and that. (Again, please read Getting to Grips with Aircraft Performance.)
Same situation, but with all engines operating....maybe V2 plus 15 or so.
Best angle of climb, clean, one engine inoperative, is green dot. Same situation with all engines operating, maybe green dot plus a bit (like green dot plus 10 or so).
These figures I cite are approximate. Check authentic manuals/documents for better reference.
For best rate of climb....according to the FCTM, you're looking at around the turbulent air speed (no kidding....it says that in the FCTM). Can't give you a page number....it's a good read.
Someone cited their FCTM (737, I think) which stated to use CI 0.
Interesting...
Fly safe,
PantLoad