My very first time on Peragus it took me about five hours. I had no idea what the hell I was doing. Divy up the hours:
Peragus, Telos, (any order) Dxun/Onderon, Korriban, Nar Shadda, Dantooine, Telos, Malachor.
That means you do each in an hour and some less.... NOT possible...