Skinshifters ability is an activated one, not static, it drops out even before we get to criteria checks
Stock Up is a no-brainer, but youll also find a few copies of Three Steps Ahead here
2 Miku, The Renowned (Feather, The Redeemed) Play It Back Again Miku, The Renowned is a reskin of the great legendary creature Feather, The Redeemed, and this card has a track record of being a strong commander
Following the above way one should board out: But I could see a different approach working, one where you go on the lockdown route with Counterbalance against U/W/R Delver, which is a valid and viable approach
As someone who likes combat decks, being able to brew Jin Sakai as an Esper attack-matters deck is a dream