I'm just thinking here.
Some solid ideas in there! I don't like the idea of Sensor Jammer as much just because it cuts into my offence potential, but StratN8 upthread put SJs and ATs on a pair of Cutlasses and that seems like it would make them stupid-durable. I'm in the FCS mindset for the same reason I use FCS Blue Bs, but Advanced Sensors work just fine as well. You're down to one action a round but you have better flexibility (although that becomes more useful as PS goes up). I'm a huge fan of the Accuracy Corrector in general, and strapping some Bombs and Mines to an AccC Punisher makes for a solid buy in my opinion.
The problem I think with both SJ and AT on the TIE/pu is that lone green die. Even with a Jammer flip and a 75% chance of an Evade, I really don't expect my TIE/pu to live drastically longer against TLTs or concentrated fire. The best option for the Punisher is arc dodging with Boost, even if it means disengaging for a turn or two. FCS, AS, and AccC all help with that a lot, and SJ doesn't bring anything to that table.
I really quite like the idea of a lone Cutlass or Black Eight pilot as a control piece though, and not just because Imperials don't have a lot of control options. FCS, EMs, Flechette Torps, Ion Bombs, and you have something that's going to be focussed down early or ignored entirely, and either way you win: if Brobots or Fel are looking anxiously at the Punisher, try and use it to kite them around and flank with the rest of your list; if they ignore it in favour of whatever else you brought, you get a chance at a clutch stress and/or ion that can turn the tide of the game, much like you mentioned.
