Awakening gem

That stun lock from his L1 coupled with his sig ability is REALLY handy. Especially in like 90% of the past boss rush challenges. HE has been clutch for so many people. I remember using my 3* max sig in one of them and just thought to myself, this would be faster if my 4* was awakened.

Frosty

You do mean Ronan, the Green Hammer Kree guy and not Ronin, the endgame Mohawkeye ninja, right?
Yes. RonAn
Why would anyone waste an AG on Ronan
His duped ability.

His duped ability is good for very few fights and just as effective when using a 3*. Not worth wasting a gem on a champ that has very few uses. With the stun lock it doesn't matter how hard you're hitting cause they never hit back so the fight just lasts a bit longer