Tested the Numidian Circle today using RoDeO - 40 Numidian Cav vs. 60 Hastati, no upgrades, on the Trebbia battlefield.

Cantabrian Circle worked fine, my Numidians were on Skirmish mode from the beginning ( ?). They caused maybe a dozen or so casualties with their javs (lost two or three Numidians to a handful of very fast, overeager Hastati ). Then when they ran out of ammo, had them charge - it was even close, though the Hastati won with about 11 surviving and only 5 or so Numidians escaping.

Quite fun to just watch, should be really nice with Horse Archers