R3 Prioritization

I’ve currently got 11 R3 champs, and have resources to take up 2 more. My priorities are mostly end game material, and battlegrounds (I guess, prefer attack options though for their use elsewhere in the game) - I haven’t done Epoch yet (I dread it but know I’ll eventually get around to it), I’ve completed only the one path in Necropolis last year (really don’t want to complete the exploration of it), and I’m finished with 9.1.
My current R3 champs are:
Science - Silk, Photon, Ham
Skill - Chee’ilth
Mutant - Domino, Onslaught
Tech - IronMan
Cosmic - Venom, Medusa
Mystic - America Chavez, Juggs
Here are my options:






Who would you prioritize and take up to R3 - particularly to help most in Epoch, and likely future challenging content?
My current R3 champs are:
Science - Silk, Photon, Ham
Skill - Chee’ilth
Mutant - Domino, Onslaught
Tech - IronMan
Cosmic - Venom, Medusa
Mystic - America Chavez, Juggs
Here are my options:






Who would you prioritize and take up to R3 - particularly to help most in Epoch, and likely future challenging content?
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Comments
DThanoa
NegaSo or sinister
Rintrah spiral
Arcade sentinal
Korg
Would you R3 DThanos before the Necro run? Did you find him much use on your run unduped?
Everyone knows he is good but most players are hesitant to r3 him. Just like luke Cage.
Also kushala is awesome. I recently ranked my 6* and she is extremely versatile, which is rare for mystics as most are niche, buff control champs. Recently I've seen few threads slandering kush and how she is not as good as chavez and juggs, which I disagree. She is as good as both of them imo. And I'll r3 her unduped her sig ability is mainly useful against skill champs right?
It won’t take much for me to be convinced to take him up. I know he’s awesome for Necro boss due to reverse control immunity. Have you done Epoch? Where else have you used him most?
I’ve only used my 6* Kushala but it’s been awhile since I really don’t use 6* champs anymore. I thought she relied on nearly max sig for best results overall.
https://forums.playcontestofchampions.com/en/discussion/386978/my-necropolis-10-year-challenge-experience#latest
I also use him a lot for war, haven't tried him much on new map but in old one he is great for serpent on boss island - aspect of evolution. Gorr on power efficiency mini boss. I also used him to solo Serpent boss in AW multiple times. In new map he is pretty useful on one of the mini bosses - footlose + stun immune + rich get richer.
On bgs He is a goat in power shield and safeguard meta. Apart from that, I mainly use him to take down serpents even faster than chavez and rintrah. He has a hidden ability most people don't know. His heavies nullify power gain buffs. He can take out most of the cosmics in bgs.
I did only one path in epoch, and he isn't ideal for epoch I think.
Thanks for the info.
Chavez is better for bgs tho.