Hard Hit attacks are most useful for breaking an enemy combo. They’ll force the enemy out of range. I haven’t really found much a use for knock down, but I think it’s effective on small flying enemies. If you use a knock down attack in a combo, you should follow with standard attack. It makes it easier to hit the enemy. If the enemy is small, high angle attacks won’t work with knock downs.
Standard attacks usually won’t move an enemy out of combo range unless said enemy is already at the outer edge of the combo range.
And that’s about all I’ve discovered. Hope it helps.
For knock down, I think it’s supposed to temporarily stun heavy creatures. Or at least, that’s what it suggests in the in-game help thing.
I also have another question.
About 4-person combo’s. Let’s say, you have 2 people ready to do a combo, and you move a third in there. Before you have a chance to move the last person, it becomes the turn of one of the characters already going to do a combo. Is there anything at all you can do to avoid doing a 3-person combo? Or, away to wait, giving your last person a chance to get in there?
Or, do you have to make your 3 people gather around the person of yours who will move last?
Sorry if that didn’t make all that much sense… It’s a bit hard to explain.