On the beginning of the mission you will receive info that Starkiller learnt the Force Lightning.
To use it, press the triangle.
Go several steps straight.
You will reach the engine.
Use the lightning on him.
Jump down and go left.
You will reach the lake full of lava.
Above the lava are levitating round platforms.
Before jumping on one of this platform, look forward.
You should be able to see holocron.
Use the Force to lift on the platform, jump on her and take the holocron.
Next go forward, but have the eye on the scavengers and their skiffs.
This is perfect moment to fulfill the secondary objective (destroying 10 skiffs).
Target the front side of the skiff (engine) and use the Lightning.
Several steps forward (under pile of junk), you will find second engine.
Target him and press triangle.
You will have to lift on the platform, which is hidden under the lava.
When you do this, quickly jump on her, and immediately on the next platform.
When you find yourself on the center of the lava lake, lift on the last platform.
Next, kill the enemies from the skiffs and destroy the last engine with the Lightning.
The explosion will create a hole in the wall.
Inside you will find the scavengers and first Jawas.
Then aren’t strong enemy, but you should have the eye on their grenades.
Go around the reactor and start climbing.
When you will reach next level, look on the right.
Slightly above the entrance you’re able to find second holocron (Force Power Sphere).
When you will reach the top, turn left and go to the end.
Take a small run up and jump on the pipes above you (X+X).
You will find yourself one level above the holocron.
Jump down on the platform, kill the Jawas and take the cube.
Now you could leave the area.
One moment later, you will reach the blocked pass.
Use Force Push and go forward.
You will arrive to narrow gorge, which is full of the junk.
Grab the metal boxes and use them to kill Jawas and other enemies.
The exit from the gorge is blocked by lava.
Fortunately just next to the footbridge, you will find three big metal panels.
After a short march, you will find a place where crashed the large spaceship.
Before jumping there, take the holocron, which is placed on the left side.
Kill them with Force Lightning.
If you still haven’t destroy 10 skiffs, you will be have chance to do this now.
They will be still arriving with new scavengers.
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