Either way you do it, though, Jef, you can only reduce the enemy's Defense by 2 at most.  Otherwise defeating enemies would simply be a matter of hacking away at their Defense score with multiple Achievements until it was something like 1 or 2, and then pulling a big Strike out to oneshot them...which, I guess it kind of makes sense, since Achievements use Strike Dice, and you would be doing a lot of analyzing and/or otherwise capability-draining, but still.