So my current party is composed of a Idolitrex Magos with a Soul Cannon, a Khorne Berserker with a Power Claymore, and a Dark Apostle with an Accursed Crozius. All are legacy weapons and routinely do absurd amounts of damage. We've been playing the starting adventure (about the Temple of Lies) and they've dropped every single Inevitable Guard with a single hit.
Now, it's not the party killing everything in one hit I have a problem with. It's them triggering 10 Critical Damage on every hit. This is starting to get so ridiculous that it's interfering with the narrative; are laspacks so poorly made that they turn into makeshift grenades every single time the owner gets killed with a power weapon? Even worse is that they never do anything; even at max damage, the party would soak all the damage 100% of the time and the enemies about 75%.
I was wondering if anyone had any advice about this. Maybe some house rules re: Critical Damage to stop it from happening every single time and straining narrative credulity? Thanks!