Bayonet and Knife why would I ever use Normal or Fast?
I have looked at the maths of these weapons. If I use a bayonet in Strong I have a 10% chance of a stumble and 30% to hit, if I use it in Normal I have 36% (axa+2ab+bxb)(a=2/10 & b=8/10)chance of a stumble and only 19% (a=1/10 b=9/10) to hit.
The Ka bar knife: Strong I have a 10% chance of a stumble and 40% to hit, if I use it in Normal I have 36% chance of a stumble and only 36% to hit and fast a 49% to fumble and hits only if I have a bonus on HTH.
The only reason I can see for ever using fast would be if you can hit more than one hostile on a card, but I am pretty certain that is not correct.
None of us have the game and cannot help you.