SWTOR Nar Shaddaa (Republic) Blue Mastery Datacron Location Guide

The Blue Mastery Datacron increases your aptitude in combat, allowing you to do more damage. It will grant you Mastery +3 to your permanent stats along with codex: Galactic History 33: Dromund Kaas. There are 5 Datacrons in total located on the planet of Nar Shaddaa.
Note: You can collect them on either Republic or Imperial Side as they count towards the same achievement.

Datacrons are collectables scattered around the galaxy in Star Wars: The Old Republic. Each Datacron contributes towards your Legacy's passive stats permanently. Furthermore, they also provide interesting Lore and Codex Entries about the Old Republic era.

Starting coordinates: -3293, -3400.

This Datacron is located on top of a pole in the upper right corner of the Nikto Sector. This is a semi tough jumping puzzle.

Start by using the crates and containers to get to the stacked containers.

When jumping to the set of stacked containers you might not make the jump due to the low ceiling. If you can aim and land on the small bit of the lowest container sticking out, then you can jump up from there.

It will look like you are barely standing on the ledge, but that will also work for the small bit directly in front of you to use to climb further up.

Once on top of the container, use a running jump to the canopy. You can get stuck on the canopy edge if you hit it from a bad angle and you'll be sent back to the beginning.

From the canopy, you have to climb the first anchor to the top.

From the top, turn around and walk onto the pipe and get to the end of the pipe.

From this pipe, you have to jump onto the next 2 pipes to the left, followed by the conduit at the end.
Pro tip: You can easily get to the next pipe by hugging the wall and walking on the ledge.

From the conduit you have to jump onto the small corner of the sign where it is attached to the wall and from there up onto the walkway. I recommend jumping from an angle to make it easier.

Follow the walkway around until you get to second platform with a view to the Datacron to its right.

From the left corner of this platform, jump down onto the anchor/tether that is connected to a pole. Make sure to align your character and jump to it. If you just walk off, you'll glide to the wrong side and miss the landing.

From the pole, use the next anchor/tether to walk to the next pole where the Datacron is located.

This will grant you Mastery +3 to your permanent stats along with codex: Galactic History 33: Dromund Kaas.

This datacron holds unheard of power and knowledge collected by an ancient race. You access its power and discover writings which are clearly only one small piece of a massive galactic history:

Once an outpost of the ancient Sith Empire, the planet Dromund Kaas now presented a refuge to the Empire's weary survivors after their long exile from Korriban. Upon landing, the Emperor addressed the populace, promising them that from this world, a new civilization would grow to eventually crush the Republic.

The challenges of colonizing such a wild planet were soon evident. Dromund Kaas's jungles were untamed, full of dangerous predators. To ensure order and discipline, military service became mandatory for non-Force sensitives. Imperial citizens took pride in this duty, knowing they were defending the future of their people.

Before withdrawing into isolation, the Emperor established a Dark Council to oversee the Empire and control the hierarchy of the Sith. He is said to have conducted many dark side rituals and experiments that affected the planet itself, leaving Dromund Kaas storm-wracked to this day.