You are correct, but it is not necessary, you can switch the archfiend call.
But do remember from my experience, this deck can only win up to legend 1 and the win rate is quite high, beyond that I've just use my own customized Shiranui deck until I'm at KOG in this Monday
Do you customized Shiranui deck is a 30 card version with grass or one similar with the standard? i'm building my shiranui deck too but i'll stay away from the grass version because it will be nerfed for sure...