The final pickup for this level also unlocks this achievement/trophy. It's located in the COURTYARD below FRANCINE'S APARTMENT. Now that you have the strength upgrade, you can get it.
Climb back on top of the mausoleum where you found the Desert Ranger ammo and bandages.
Turn to face out over the door. Then jump over the fence onto the next tomb. (It's either a running jump or a standing jump-and-grab from the edge.)
There's now another guard dog (2) near the big wooden door at the beginning of the path. It will approach when Lara descends. So, if you're avoiding the dogs for the "Good Boys" achievement/trophy, quick-save once more. Then hop down, run/jump along the path toward the wooden door...
...and climb on top of the second mausoleum on the right (i.e., the one with the triangular decoration in front, where you probably dropped down from the balcony earlier). If you're very nervous about the dogs, you can instead jump from tomb to tomb without touching the ground, but this way is faster.
Walk to the other side of the mausoleum roof and turn around. Adjust Lara's position so she's standing about halfway along the long edge of the roof, and the corner of the spike-topped-wall is lined up with her left shoulder. Save the game before side-flipping over the wall. If you miss the jump, Lara will be impaled.
If you're successful, she'll sail over the wall into the COURTYARD below FRANCINE'S APARTMENT.
Barge down the door opposite the little doghouse.
Pick up the V-packer standard cartridges (9) to unlock the "Death-Defying" achievement/trophy.
Return to the courtyard, climb the drainpipe in the corner, and traverse left until you can pull up onto the balcony.
Stand beneath the red wire and jump up to grab it. (Maybe you've already done this once before.) Traverse across the courtyard and drop onto the next balcony. (If Lara won't immediately traverse forward, try pulling her legs up using the Duck button.)
Follow the balcony around to the end and drop back down onto the mausoleum roof.
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