Thanks guys for the input.
This is what happened. I choose to go with the higher armor value for Chin-You, a insane troll sammie charged Chin-You standing up for two IP, while the rest of the team made a running escape for the waiting helicopter.
I am kind of glad I used the 18/18 armor option due to the fact that the ork gunslinger sammie in the group shot an exex round form an areps alpha (7p) with full auto + (9p) and using edege managed to score 11 hits, for a total of 26 p, I managed to react the damage down to 23, without edge I would have taken 12 P, form this burst alone, hence the armor value of 18 was not totally unreasonable, even though the burst of the ork sammie was kind of lucky. I also might have missed using some perks of Chin-You maybe I should have full defended, but I felt that the mighty Yama King would not feel the need to defend himself against puny mortals
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The troll sammie player was happy sacrificing the his character for the team, making an epic portriait standing battling the yama king on a the roof of a kowloon walled city building while the rest of the team swooped out on the chopper..