I didn't even know that the redcaps difficulty was a thing ..?!
These guys just happened to be in my killing path while doing the run.
What do you have to do to make them "challenging" ?
it's not hard for people that understand that this game is basically Larian's homebrew version of 5th edition mashed on top of DOS surface/barrelmancy, but for people who are expecting the game to even have a loose adhesion to the actual rule system, I could see how the encounter would be challenging.