I will take a moment here to state clearly that if all your combats are hits and they are "Boring" the fault lies in the stories being told, and the encounters being presented.
If the encounter is set up in such a way that the feeling is that it's "just a time waster, as we wade through these guys that we are always gonna hit" I suggest, get a real sense of the dramatic.
Here comes 6 easy guys to our 6 high level heroes does not work.
Stem the tide against 24, or 40. You NEED to get those hits, one two three four..."Hey, Look, I got my four, Gents, I'm heading back to the aid station!" while they alll fight on, doomed to die where they stand.
It's a sort of tale where the heroes at higher levels can go at a few guys at once, and maybne make it, until the enemy bad guy is in your face, protected by magic, and you are wounded, already near death, but MIGHT make it through if you are lucky, and have the aid of allies, because you are a hero, worthy of such comrades.
Mechanically, a wholew bunch of godd ideas are in here as variants, but I think it's a story problem, and a perception of what the system is and should be.