Have you used them? Substitution ratio to T90 pellets? They sound like a great candidate for dry hopping. I haven't used them yet.
Yes; as "whirlpool"/"hop steep" additions, but not as a dry hop. For hop types, it's been mostly Citra, but occasionally Centennial, Cascade, Amarillo, Chinook.Have you used them?
As a starting point, I substitute 1/2 oz cryo for one oz T90.Substitution ratio to T90 pellets?