Should I go for 5* Featured Crystal or 5* Basic Crystal?

I am at mediocre level and have 12 5stars but need some strong ones. For that which one is better?

Comments

Dual crystals

Whats that?

Basic. Go featured only when you have 30+ 5*s and the pool is good.

Got a dormammu😔

Got a dormammu😔

Dormammu is useful to counter power gain.

Go to featured, chance to get duped is higher than dual class

What is dual class?