Against higher-level enemies, debilitating them is really the key as opposed to doing outright damage, because you can't afford to trade shots with them. Outside of Madora, whose my general damage-dealer, my party is generally focused on crowd control. In each fight, my general strategy is to keep the melee mobs away from me through any means possible, and once I'm comfortable with my position relative to them, I start laying in the damage.
This is how I take on most battles. I let the field set itself up, incapacitate priority targets or as many as possible, then whittle down. I've managed to scrape through some battles I probably shouldn't have any buisness being near, and I think it's great the difficulty is more based around your ability to think and plan than anything else.
It makes winning hugely satisfying.
By "cheese" I meant that previous video posted, where the person stacked a bunch of barrels on a miniboss and pretty much one-shotted it. Or examples like that.
I'd say that was more inginuity and planning than cheese, the sanbox nature means you could potentially use these kinds of tactics in many places in the game.
You could, in theory, carry a dozen barrels to
and explode him too, but that would take a considerable amount of time, maybe just as long or longer than the actual fight, so I don't see how it would be cheesing when the amont of effort would be the same.
Of course there will be moments that are easier to set up than that, but it's still about recognising the exploit and planining it well, that the game allows for that kind of thinking is surely a good thing?