First off it's not Vig/Focus, we're not Jedi.
Vengeance is a blast while leveling and the PvP is great once you get Unstoppable and Impale. If you want to tank some buy the field spec for 200,000 comms and just respec to tank and carry a Shield with you.
Of all of my 55's my Vengeance Warrior is the most fun.