I did a quick rule check and the stress card says no decloak with stress, pair this with ion and your set against a phantom.They'll have to go off before the Phantom can attack though. Otherwise, it goes like this:Flechette Torpedoes cause stress even when they miss (and you can't cloak or recloak when you are stressed).
1. Phantom fires, cloaks
2. Phantom gets stress
3. Phantom decloaks <--------- can't decloak with stress
4. Phantom executes a green, clears stress
Unless you can get the stress on it before it fires, the stress does exactly what it does to any other ship - forces it into a green maneuver. That may help, but it's not actually going to do anything to inhibit the flicker.
http://www.fantasyflightgames.com/ffg_content/x-wing/news/wave4/cloak-action.png