Here i'll post my results using the tactical solutions offered by members of the forum,

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playing Yabusama's Monk Rush 
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AI = 10 x Honour 2 Monk

using Yabusama's advice and setup I selected my units,
pressed continue - and it was raining.
Oh wtf i said, the monkeys have butchered my men so often my guys must know whats gonna happen to 'em, made out their wills and so forth, 
SO:- I'll play in the rain.

Battle begun and the Ikko-Ikko charged headlong,
i sent forward my monks, charged my No-Dachi at the Taisho(exposed) and at a hole left by my monk screen,
I only took a few out with archers because of range effect from rain, maybe 20 across 3 units,

My monks on my right broke immediately so YC had to do a frontal charge, - broke that unit of Ikko on contact and i ordered YC to continue into the mellee,

then 4 things at once
The muskets became engaged hth because of the gap and broke,
and - at the time I was too busy too notice - one of my archers broke,
my other monk(left) broke,
and the Ikko-Ikko Taisho broke,
so i select all units and ordered a hth charge on his Taisho,
thinking i've lost without my monks and muskets anyway,
time to Die with honour,

the charge bonus from hill must have kicked in,
the Ikko-Ikko ALL broke and it was time for the head viewing ceremony.
 

in the rain - no musket fire, my sole musket unit was forced to try clubbing monks - the musketmen were not happy about spilling blood on their shiny toys and went home early!

presence of unfired muskets as unit closes for hth may have a moral effect??
the Archers did Exceptional damage at close range,
172 kills for 58 losses(in hth) - majority of kills must have been arrows.
Charging No-Dachi downhill, 113 kills - lost 92 - remember No-Dachi charged into chaos, outnumbered but did not break!
my Monks only killed 32 for loss of 97!!! BUT they were HEAVY outnumbered, and held the Ikko in place for archers to shoot at.
YC killed 118 for loss of 51

all told i killed 435 and lost 327
 
 

My setup was identical to Yabusama's,

Game running at full speed, as people start thinking about a fresh cup of tea and leaving. 

So I figure - what the hell, and order everyone to charge the Fleeing Ikko Taisho

 
 
 

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Next Monk Rush 
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coming soon
 
 

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Fire...

...within minutes we fled...