You always want 4 units of cavalry, because they can flank 2 rows
Example of battlelines in a 10 inf 6 cav vs 5 inf engagement -- only the front row can fight at once.
*Edited for clarification
It can be valuable to add another 1 or 2 cav in case you lose some, to keep them reinforced..
Example of battlelines in a 10 inf 6 cav vs 5 inf engagement -- only the front row can fight at once.
Code:
CAV INF INF INF INF INF CAV
CAV CAV INF INF INF INF INF CAV CAV
vs
INF INF INF INF INF
*Edited for clarification
It can be valuable to add another 1 or 2 cav in case you lose some, to keep them reinforced..