What are your cheapest core units to defeat Rome?

[QuintusSertorius]

the northern gaul swordman is already elite as it is they are a kind of carnutes and i do love them greatly even tough they tend to drive me to the red more often then not

Bataroas have even less armour than Camillian Hastati, so even if you consider them "elite", they won't last in prolonged contact with even the lightest Roman line troops. Even the Golberi Curoas aren't equally armoured, though they just top out the Camillian Hastati in total defense.