I did 5-6 the first day I was 50, and I ran the solo ones on Corrilia once. I have no intention of doing them again. It used to be that I was fine with that, my 2 augmented Columi implants could stack damage higher than Rakata anyway (+28 power augment) but with the 1.2 changes to augments I'm no longer sure that's the case (the same augment is now +18 power, +12 endurance, or something like that).