The first golem should be killed at
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×(13,19)
and from there, the plan is
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×to get the second golem stuck NW of the rubble so you can lure it all the way to the west (using the shallow water corridor) and then make a stepping stone next to the orb.
To reach the secret:
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×Use the third golem.
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×If you left the middle golem until last, this should be pretty straightforward.
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50th Skywatcher