How I represent In Pacto flexible Cavalry and Infantry units of 2 elements
1 base of each of the types they can switch between in each TuG - e.g. the cavalry would be 1 base with 3 figures and 1 base with 2.
And infantry a 4 and a 3.
So you puts the fuller bae at the front for the denser formation.
Cav in loose
3
2
Can in skirmish
2
3
Inf in close
4
3
Inf in loose
3
4
Ta da.