hi I'm thinking of start a campiagn as brition on veryhard veryhard and was wondering what a historical army might be for them

I'm thinking it might be:

4 light infantry
3 medium infantry
2 heavy infantry
3 slinger or archer units mostly 1 archer 2 slingers
3 skrimisher units
2 chirtot units or 1 cav and 1 chirtiot
generals unit
making 18 units then maybe adding 2 to medium infantry or 1 to light infantry and another to heavy infantry

would that sound about right