Do I sit on these 7* Crystals until the pool updates?

Tlyer102062006

Hey all, I just wanted to share my roster and ask what yall thought if I should go ahead and wait for the 7* pool to update in 7 days or just go ahead and open the crystals I have with my minimal roster of 7 stars.

Ben_15455

With the 7*s you have now I would just open it right now, the going to the name that are actually good is Prowler and NTW, maybe silver sable after the buff