it is my understanding that the monks are an additional grunt troop or elite troop choice, and that by declaring that you are using one of the Lord Heir choices bans you from using the choices from the other Lord Heirs...
using that logic, then you would not have to field 2 units of monks to get a Support assassin, or one monk unit to get an elite assassin unit...
as for do you have to use the monks at all, they are nice...I use Bushido Samurai as proxies and the Urban Mammoth Kabuki Dolls box set for the Metropolis game as proxies for the Kikigomae...
B...