In 3.5 Improved critical and Keen do not stack. In fact pretty much every feat, spell, and option that increases critical range has the text "This effect doesn’t stack with any other effect that expands the threat range of a weapon." or something similar in its description. (There are a *very* small number of effects that explicitly allow stacking, but they are rare and usually in 'splat' books.) If you had a DM that allowed them to stack anyway (like they could in 3.0), Your range would be 12-20.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.