How to balance the horse archer

[BlackEagle3114]

This
https://forums.ageofempires.com/t/incendiary-arrows-increase-horse-archer-damage-by-40-and-also-increase-attack-speed/189348/4

And this

Rus Horse Archer attack speed is 1.5 not 2s

FYI, Khan and Mangudai attack speed also quicker than the stat when stationary. I assume could be a hiding bonus for stationary horse archer to shoot quicker. While Rus Horse Archer can only shoot stationary. (Camel Archer not included)