Gonna go with Vif-Argent's Porygon2. P2 is way too reliable for me not to vote for it. Basically had to decide which spread I thought was better and for Greninja it's looking like phys def is the way to go, imo at least. I did some calcs to see how close the 2hkos were on each sets weaker side. 252 SpA Life Orb Greninja Hydro Pump vs. 244 HP / 4 SpD Eviolite Porygon2: 74-87 (38.7 - 45.5%) -- 12.9% chance to 2HKO after Stealth Rock 252 Atk Life Orb Protean Greninja Gunk Shot vs. 244 HP / 12 Def Eviolite Porygon2: 78-94 (40.8 - 49.2%) -- 71.5% chance to 2HKO after Stealth Rock 252 Atk Life Orb Protean Greninja Low Kick (60 BP) vs. 244 HP / 12 Def Eviolite Porygon2: 81-96 (42.4 - 50.2%) -- 87.1% chance to 2HKO after Stealth Rock These calcs aren't that great for either set but I like the odds of phys def, especially when you consider that Greninjas running sash make the calcs much softer. Still a hard choice between the two if you wanna consider Dark Pulse flinches and stuff but it's hard for me to decide if that's enough to change my vote so im gonna stick with phys def. Ideally I would've liked to see some kind of mixed spread for ninja but /shrug.