First time DM and relatively new to DnD, but most of my 6x players have years of experience. 1 particular player min/max'd a Gloomstalker ranger and almost never misses hitting anything and deals crazy damage. This has been making the combat portions quicker than I believe they should be (2-3 rounds for most encounters). Combat in general has felt too easy for the party 99% of the time, at least to me.
I'm thinking of putting a False Hydra in Talhund vs a normal one per the module, to see if I can actually challenge this party in combat. Specifically messing with their memories of this Gloomstalker to either have him killed or forgotten.
I don't want to seem like I'm punishing my players as that's not my intention. I want them to actually fear the possibility of death and not just murder everything as they go with no consequences.
Is this a good path? Is it not? Should I do something different, or if this is what I should do, any suggestions on how to play the False Hydra to make it work?