+3 Endurance (2722, 2496): To get this datacron, head to Outpost Talarn in the Juran Mountains. You need to purchase a Red Detonite Actuator from the vendor south of the Outpost at coordinates 1866, 1084 marked on the map.
Once you have the item (costs 2k credits), head to King’s Pass and go to the very south portion of the map at coordinates 2370, 2443 marked on the map you will find a cave filled with level 40 elites.
Once inside the cave, head to this location marked in the map.
On the wall should be something you can click and detonate to open up a new entrance which lead you to the datacron.
+3 Willpower (-2508, –428): This one is pretty easy to get. Head to Glarus Vallery (take speeder to Panteer Hideout or Outpost Ghrent) Then go west to Castle Panteer.
Once you are inside the castle main room, head to the SW corner and look for a door. There is a small crack you can slip through!
Take the stairs.. then take a right once you are on the top floor and go around the Balcony until you reach the broken statue. The datacon is located there.
I seemed to have a small graphical glitch here that turned my char into a darker color.. which I thought was pretty cool! (Xalek is confused as usual)
+3 Presence (-81, –268). This is probably the easiest datacron ever! All you need to do is to head to –411, –201 in Glarus Valley (near Outpost Ghrent)
You are looking for something called Saddled Thranta.
Click on it and it will transport you right to where the datacron is. Once you are done, click on /stuck and get ported back.