That’s subjective. Just create a topic, asking fellow players what they think about this, like I did with Glaive, and then you can come to some empiric conclusion
If the blast was strong enough to push an enemy away, it would also push a dwarf with the same speed in the other direction in accordance to Newton’s 3rd law.
Luckily this game is not realistic, and dwarf can still push away hordes of smaller enemies without being knocked down himself.
Arrow and shotgun impact is videogame/film cliche. Yet again, Newton’s 3rd law.