Which champion should I rank up for the completion of Act 6.3 and 6.4?

I already have Doom Corvus,Void and Falcon at Rank 5.

Comments

He is immensely helpful in act 6. Such utility and great against 90%champs and counters many nodes

He is immensely helpful in act 6. Such utility and great against 90%champs and counters many nodes

Yeah I also think the same but I wanted to take the opinion of other summoners who completed Act 6.

I much prefer Guilly. I couldn't have done completion without her, and I've used her on many paths during exploration.