Sure, but if someone could do it the hard way, they probably wouldn't be looking for help here. It's easier to pull the lynchpin.
But if someone wants to do it the hard way, two things to get you started:
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Note that the chambers with the Giants open in the front and the back... you can do things like take out the front half of a Giant in those 2 wide corridors, and go around back later to get the other two golems.
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Here's a bit you might be missing about Rock Giants... your sword acts as a sort of a wall, and can keep them away in positions that would not work with a smaller monster. This means that you can do things like hold off a Giant indefinitely, simply by standing sideways in a 2 wide corridor... you don't need to turn around completely to get to a safe position, like you would with a small monster.