" damage spread like 8-48, ninety percent of damage results were around 10-11." My party's weapons range somewhere between 6-27 (rough guess) and hitting for 10-11 is very common. Bigger hits are not uncommon.

"Maybe the case is that almost all enemies have a bunch of resistances". It's simple enough to right-click and examine an enemy to see what its defences and whatnot are.