Şifr might be worth combining with this card. If my understanding of the rules is correct, if you reduce ice strength to 0 while playing Prey, you may trash 0 of your installed cards to trash the 0 strength ice. If this is correct, Şifr would make this a 0, Forked, Knifed and Spooned all in one card. And, unlike the cutlery events, you are not limited to the first piece of ice you break subroutines on, you get to choose which of the ice you want to trash.
You couldn´t use ddos to bypass it. As for Logic Bomb which you maybe meant, you can
— m.p