archery tests (are Samurai archers worth it? etc)

[crzyrndm]

Very true. However, by the same token, casualties taken 'hurt' the effectiveness of the unit too, with each casualty for Ashigaru reducing total unit effectiveness by 1/120th while each casualty for Samurai reduces it by 1/90th.

But killing Ashigaru is so much easier than killing samurai.
4 armour instead of 1, and a higher melee defense also.