Thread:BlitzerRyuusei/@comment-9693174-20151231230551/@comment-35019468-20151231231351

It depends.

You should avoid attacking your opponent's SIGNI if:
 * You're playing an aggressive deck (to limit the ener your opponent has for defensive ARTS)
 * They're playing an aggressive green deck (to avoid them accumulating ener for Big Bang mk2)
 * They're playing Piruluk (because they're probably never going to run out of SIGNI anyways; you should still kill problem SIGNI though)
 * They're playing Anne and you're playing a deck dependent on SIGNI or LRIG effects for offense (because that ener goes into Suiboku keeping Contempora alive)