[FF]Louis-Ste-Simurgh and I tried cav archers against normal infantry archers a few days before we started our phalanx tests. Circle does make a huge difference; it tires the horses out faster but makes them very hard to hit indeed. I don't recall the exact numbers, but the difference was both significant and unmistakeable.Originally Posted by Doug-Thompson
Circle is one of the reasons cav archers now beat foot archers, rather than losing to them a la MTW and STW. The infantry can't hit them and the cav can rip them apart at leisure.
It also appears that infantry archers may not get a bonus when shooting at cav; in all our tests with the two types of Roman infantry archer against vanilla and specialised Scythian horse archers the infantry lost. The more advanced infantry archers (archer auxilia?) did have a slightly longer range than the cavalry; it gave them one extra volley before the cav started shooting back. The vanilla Roman archers had the same range as all the assorted cavalry archers, IIRC … certainly the same range as most of them.
So, based on our tests, and my in-game experience which prompted them, cavalry archers are no longer countered by infantry archers. In fact there does not seem to be a natural counter to them. Even light cavalry tend to get shot up quite badly while closing to melee due to the cavalry archer's ability to move and shoot, and the Parthian shot ability.