My friend uses these often and I was shrugging it off at first because I'm still new to the game myself and nothing's invincible but it's really really starting to wear me down.
Carnor Jax screws over all my favorite squadron things. Kyle Katarn, Blaster Cannon, Proton Rocket, Jake Farrell, Garven Dreis and any attempts to keep my guys alive in general. Attempts to kill him are hampered by the lack of focus to get good hits or fire rockets and, again, lack of proton rockets. My guys are all dead in the water and Jax doesn't even have to do anything save exist.
Tie Phantom is even worse. Using Echo it can pretty much go wherever you want it. I had thought at first glance that although 4 hit dice is ridiculous, it was balanced because of it's weak defenses but Advanced Cloaking device ensures that it remains at 4 evade permanently as long as it can shoot first. And it can 1 shot anyone who gets in front of it. The ONLY reason I can hold my own VS it often is because my friend has trouble positioning it well during a decloaks. And he's getting better at it quickly.
I hear Flechette Torpedoes are supposed to screw up phantoms but how? He just needs to make a green maneuver while cloaked thus maybe missing killing something that turn and then things are back to where they left off.