Lightning attack knockback/knockdown...

Couldn't this potentially ruin chances to assault slash?

probably.

Ah, that's a bit of a shame, but I suppose it wouldn't be too terrible if it's a pretty low chance.

A video in a previous discussion shows that the chance is rather low? but I wasn't exactly looking at it. I don't think it'll do a lot of damage, but at least it'll knock them away further (unless they bounce in place).