This ins't that hard, just takes a little bit of patience. In Beta I cleared it as a Madness Assassin, on live a Lightning Sorc.
In beta I was Bio/Bio/Dip.. so I had access to a Prototype Bio-Enhanced Med Unit, Command Stim. This was post Khem nurf and I never dropped below 60%.
Live I'm synthweaving, so I purchased a couple Bio-Enhanced Med Units and a Command Stim from the GTN, then just healed Khem as a dps'd.
The stuff on the GTN is cheaper then the stim vendors, and is of a higher quality.