Killed Dengi with the following composition:
Milou Skye
Felix
Connor Sunderland
Cassius Bauer
2 miniguns, 1 cyber, 2 plasma 2 NPS HULK armour + 2 Wega. Only the main character survived.
I play 0.8.4.2. This version has a translation. I know English very poorly.
NPS melee weapons inflict additional damage. But not everyone. And the less health they have, the more they beat. This is according to its own observations.
This says help.
Power Strike
You sacrifice accuracy in favor of increased damage, with either a ranged or a melee weapon. You take a reduced (-15%*) chance to hit, but get an extra damage dice (5-18*). Additionally, Slow melee weapons such as Sledgehammer and Great Sword do an extra +10 damage with a Power Strike, and +15 for a Great Axe.
I.e. up to 28 damage can be added to sword damage. And the damage is like plasma.