Which amoung the 7 star is best for rank 2

Jason_32

The_Doctor_24_1

Destroyer

Depends on what do you need. Enchantress is an amazing defender, but as an attacker you're gonna struggle to end fights quickly and efficiently. If you want a double threat, out of all these champs Destroyer it's the best by default (i must emphasize that I own both as 7* R2)