To get the ball down from the top of the square column, plant a bomb behind the column close to its base. Position each character on one of the 2 pressure pads to lower the column.
Then detonate the bomb to move the ball off the column.
If you're going after the red skulls, roll the ball onto one of the pressure pads and have one character stand on the other pad to lower the column. Then position the other character on top of it.
Have the first character move off the pad so the column rises up again. Now the elevated character can jump to grab the wooden ledge above on the left (NW). Pull up and take the skull. Then carefully drop back down onto the column and from there to the floor.
Move to the gap on the right (SE) wall. Have Totec drop down onto the wooden ledge to get the other skull. Then Lara can use her grapple to pull Totec up. Alternatively, Lara can go after the skull, grapple Totec on the ledge above, and climb up.
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