I'm replaying and lost count of how many barghests I had to kill in the first chapter alone. At least in this game it makes sense for them to spawn out of thin air.
Next up, there's the swamps... and its legions of drowners and bloedzuigers. Luckily the combat is pretty fast-paced or it would become tedious very quickly.
Swamps wasn't so bad, eventually you can avoid most of the mobs. Then again I only went there in the day, so maybe that was it. But yeah, there's a fair amount of slashy slashy in Act I, II and V.