What are the most valuable 2 Stars from Fantastical Parade? For collecting purposes

I’m around 400 points away from being able to use my pack points. I’ve already gotten RR Mega Mawile, RR Ninetales, RR Toxtricity, and Sightseer. Besides getting Diantha, who strategically should I be using my pack points on? Is Piers considered value or not?