I recently played a game of kill Team that involved a multiple damage weapon against a unit with a
FNP rule. for the life of me, I could not figure out how many dice I should have been rolling for flesh wounds.
I'll try my best to describe the scenario.
I was attacking an arco-flagellant with a boss nob armed with a big choppa. The big big choppa is a two damage weapons and the arco-flagellant can ignore wounds on a 6+ (I forget the exact wording, but essentially
FNP). Two 2 hits with the big choppa make it through and then things get complicated. The arco-flagellant rolls one 6 for the first 2 damage, and then rolls for the second pair of damages and gets another six.
It looked a bit like like this.

and
How many dice should be rolled for the flesh wounds?