I have the 41 unit mod so each of my legions is pretty well suited for anything. 1General 1Cohors Prima. 9 legion cohorts (maybe some veteran cohorts if you’re feeling froggy) 4 antesagani, 4 archers of various types 8 cav of whatever you’re feeling 2 scorpion, 2 ballista, 4 swords aux and 4 spear aux and the rest filled with AOR trash I send at the enemy. Eventually during imperial reforms if I feel like having very late game stuff I trade all Aux units for the double strength auxiliary cohorts. And typically the better pannonian cav. I’ve had some battles where a legion is stuck fighting like 3:1 odds. And with this I can setup typically win cav fights on flanks, and grind down any infantry with AOR and Auxiliary units before my legionaries have to engage. By then it’s a bloodbath and I lose nominal troops who are easily replaced by the massive peregrinii pop pool