Yes you can, i just solo'd it at 11 (12 when i finished) and it wasn't that hard, do some kiting on the bosses when needed and let mako heal you a bit.

For anyone still looking for these it is really easy with this route:

Nice map! If you go to the tombs area i made a video that might help you find them:

I found some co-ordinates from other threads and made this video of a route that will get you the cubes in no time, good luck:

As imperial i saw a vendor on belsavis selling lots of customisations, i didnt like any of them though so i moved along fairly quickly...

I dont think there is anything wrong with these things, the better question is: Why do i have to go Biochem on every character or gimp myself?

People keep saying that but it's gotta compete with that polished game so..... Dont get me wrong i love the game but that excuse is not good enough, they can learn everything good from past games, if they need 8 years to get on par then they are not good enough imo.

Here is the video of the route i used to get the energy cubes: It's pretty basic without sound but you can see where each one is on the map and its pretty easy to follow, in fact if you have a second screen you can just follow in time with it. The sad thing is after doing all of this i realised i dont need the green shards for my merc, /facepalm

Using the co-ordinates from these 2 quotes i managed to find 13 in about an hour or so. At first i couldn't find any using the ones from Inktar but when i checked the co-ordinate Andreas posted it was there and then started to spawn at all of the others. There was only 1 spot that i never saw it spawn but i have seen a screenshot of it there before so im sure it is random chance to be at any of these. I am not entirely sure but i believe this is most if not all of the co-ordinates in the Tombs area, since they respawned quite regularly once i found the first. I have also recorded my route on video so if i get around to uploading it i will post it here too. Good luck finding them!