With every dark souls game, I hear a lot of complaints when players who enjoy a tanky, defensive build come across enemies that can out-tank them, and hit harder with better range. That's when the game is telling you to add some variety to your gameplay. We're intended to try different tactics. The game punishes players who place limits on their build. Such as the players who refuse to use any kind of range (not even consumables).
In my case, I hit some trouble with my pure INT build trying to take on those Lion dudes with high resistances in the shaded wood. I ended up using holy waters and a dagger for backstabs. Not what I built my character to do, but it worked.