Indeed, I don't think you all understand how the damage scales. After enemies are gray to you, they do little (like 30/hit) to no damage at all to you.
I'm a Sentinel, with Doc as my companion.
I have a rakata/columi gear mix, with Doc sitting in a mix of Champion/Columi. Its very easy, I'll try to get a video of SD-0 or Subject Alpha up in the next day or so.
I solo Coruscant and Taris without even looking lol.
My guild has beaten all the world bosses and is currently 10/10 Normal Ops and 4/10 Hard Mode. We should get 9/10 Hard next week though.