Coordinated Attacks and Knockback

[Tonio]

The rules say that Knockback is determined normally for each attack, then added.

 

How would that work if the attacks being coordinated come from opposite directions?  Or, in any case, different directions?

 

In the case of opposite directions, would that result in no Knockback movement, but damage as if hitting a wall?

[Steve Long]

For the most part I think this can be left to the GM’s common and dramatic sense. As a general guideline, for attacks coming from different directions I’d suggest the GM figure out an “average” of all the direction vectors and use that. For diametrically opposite attacks, the method you suggest — no movement, but damage calculated as if hitting a wall — seems reasonable to me.