Never really had a problem with this one. The TIEs were pretty easy to take out. You CAN try a different strategy. Instead of going after the TIEs right away, go after the ATR that is control them. Killing it it pretty difficult (in an A-Wing), but if you fire a few missiles at it, it will run away. After it hypers out, half the Tie/E's stop working.
Every dog has it's day, but a dog with a broken tail has a weak end.