Get a Free 3-6 Star Baron Zemo this Week!
Log in to the Summoner's Market at https://store.playcontestofchampions.com/ and claim the Baron Zemo Selector between 10am PT November 24 and 10am PT on December 1st.
Proven and Below: 3-Star
Conqueror/Uncollected: 4-Star
Cavalier/Thronebreaker: 5-Star
Paragon/Valiant: 6-Star
You can only claim this Baron Zemo one time. The Baron Zemo is delivered as a selector, claiming it will require you to choose your rarity immediately. If you plan to change your Progression level during the Cyber Week event, we suggest you wait until you have made that change before claiming this selector.
Log in to the Summoner's Market at https://store.playcontestofchampions.com/ and claim the Baron Zemo Selector between 10am PT November 24 and 10am PT on December 1st.
Proven and Below: 3-Star
Conqueror/Uncollected: 4-Star
Cavalier/Thronebreaker: 5-Star
Paragon/Valiant: 6-Star
You can only claim this Baron Zemo one time. The Baron Zemo is delivered as a selector, claiming it will require you to choose your rarity immediately. If you plan to change your Progression level during the Cyber Week event, we suggest you wait until you have made that change before claiming this selector.
5* corvus to r5 or 6* doom to r2 ?

Comments
Not even start story after 5.2
You got right i take to r4 only few (ends on Magic). Got other good but no resources to rank them up.
Still have 5* cosmic gem but wait for hype. But might use on corvus when rank him up to r5.
TY
And still not spending any money
Furthermore, your current progress placement in the game makes resources slightly harder to come by. When you figure that you're also spending 50% more resources to level Doom, what might seem like a close race isn't really close at all. You have too many good champs sitting at R4 (like Aegon) to spend 50% more taking up Doom. That R1 Doom will still get you plenty of mileage. Take up Corvus. Take up Aegon. Then when you get the resources (again), consider where you are in the game and decide if it's time to take up Doom. If you had a dearth of viable 5* options it might be different, but you don't.
People like to just toss out things based on the latest and greatest (e.g. Doom, good prestige, great for abyss) which likely isn't pertinent to what you need now. Roster choices are VERY much subjective based on content and resource needs.