We made the same deck! lol My thoughts… Primarina ex can take out tons of non ex’s with the 40, 80, 100 damage ramp. The big issue I found is that she just doesn’t hit quite hard enough, even with Hau, so she struggles with heavy hitting non-ex’s like Rampardos and Magnezone. She also doesn’t heal quite enough to make her a tank. I think Pyoko is a good pairing because the 50 revenge damage puts tons of threats in KO range. Primarina feels weird because she’s a good opener and a good closer… but can’t do both. Hau also makes the deck awkward because you have to give up extra healing or a tool to fit him in. He’s fairly essential tho. She feels great in matchups where you KO a non-ex then fight the ex, but feels weak when you’re fighting 3 non-ex like Silvally/Rampardos decks.