Their level isn't an issue. But it is one of those "prepare" style combats.
BG3 isn't a "I can breeze through every combat" sometimes you need to load and use your knowledge to win.
Further more, you have to have decent builds at this difficulty level, maybe on lower difficulties you might not need them, but here it's detrimental that you don't botch your builds.
I have no issues with any combats, and I don't cheese with barrelmancy or use dipped items etc, but I know my characters and what's going to work. I gain advantages I need.
By all means this isn't an easy fight, and if you look at the location, this might even be a fight you should wait for till level 5 in the final release (Which is possible in a final build)
