Now, I'm not some amazing player, so while this is a rant, it's also a legitimate question.
I did a local store championship recently, and I got destroyed, losing four of five matches. However, the first two matches were where I came against a real problem that I couldn't figure out a way to really stop it - the Tie Phantom. In both cases, it was a nearly identical list, a decimator with Palp, and a Whisper, I believe, though the loadouts were a bit different.
But the end result was the same. I wasn't running aces, so I had zero chance to really outmaneuver the phantom, unless they made a mistake - and without outmaneuvering him and preventing that cloak, I had no real chance to do damage to him because of the ridiculous four agility. I can't stay out of his arc, because his maneuverability is absolutely insane.
What are you supposed to do against him, if you don't have any real options to force damage through, or shoot before he cloaks?