no no no, if there is Ater congestion, you will never be able to improve throughput.
These parameters you mention are only useful if you want to decrease Ater congestion while accepting to decrease throughput.
The only solution is to remove the Ater congestion. And the only way to do that is to install additionnal Ater-PS links.
If you cannot install them, then the congestion cannot go away and you cannot increase the throughput.