I'm going to assume you're talking about our game earlier. You exaggerate wildly of course, but we did alright.
There's certainly not much messing around needed with the Turian Ghost though. It almost plays itself. Cloak before shooting, chain overload to stun pretty much whatever you want dead, shoot it as it gibbers. Rinse, repeat, jetpack punch for giggles and the vain hope of 20 seconds of bonus damage. On the rare occaisions when being invisible almost at will isn't enough, there's stimpacks for instant sheild refill.
Hell, I don't feel the lack of a second gun. With Phaeston finally at X and a fully upgraded piercing mod, pretty much doesn't matter what you're shooting at, especially after the various damage bonuses passive and otherwise from the class.