subject in Iliad 1:127-128

[Bert]

...,[face=SPIonic]au)tar )Axaioi\ triplh=| tetraplh=| t' a)poti/somen[/face], ...What is the subject of [face=SPIonic]a)poti/somen[/face]?
The form is 1st person pl. but [face=SPIonic])Axaioi\[/face] is nominative.
Can this be combined to read - we Achaeans will repay you three or even four fold?

[Hal]

That is how I understand it. Achilles is speaking on behalf of the other Achaeans.
Hal