While this is true, the guardian starts with a lame tank droid while the jugga´s got vette. And vette´s skillset blows every other dps companion at that level out of the water. So the jugga feels way stronger than the guard because of his starting companion.

If you just want to level, every class works fine. If you want to solo Heroic 4 Missions or Flashpoints you need a Tank Class w/ Healer Companion or vice versa. In my opinion the strongest solo class is the Medicine Operative. Companion Healers dont cut it in tough fights, but you as a healer can keep a geared Kaliyo alive all day long. This combined with stealth, a great amount of CC and the ability to deal damage while your HoTs are rolling is stronger than any Healer/Tank Combo out there. Most healers dont have the time to deal damage while keeping the companion alive in tough fights, but the Operatives healing style suits that just fine.

Double Agent Agent