As this is the later Persians they are using heavier infantry to bolster the battle line
But they still have plenty of light troops, below are the Ax and Ps...
...and mounted troops to work around the flanks, with the Cavalry and Light Horse elements
If that doesn't work they have the blunt instrument of the scythed chariot to throw forward
Finally, to command and co-ordinate everything there is the general element which can be deployed as cavalry or in a chariot. I have based the painting of the generals chariot on the famous Roman mosaic.