Which double-immunity 4* champ should I Rank Up?

Thi101

So, the thing is... I still don’t have that many 5*, so I still use my 4* a lot. But, from all my top champs, none is immune to something. Literally... no 4* I ranked to R4, nor 5* I ranked to R3/R4 are bleed/poison immune, which makes nodes like Biohazard really annoying to deal with. I also had some problems with the shock noded path on this month’s UC EQ...

So, which 4* double-immune should I focus on?

Fhfjghhggggjfhfjg

Emma Frost (R1 to R4) - unduped

Emma frost or thing are ur best options here

MawrCalleach

Iceman (R4 to R5) - unduped

He's already r4,so you won't waste that many resources to get him to r5. Thing in my opinion needs the full synergy(I might be wrong,that's just my view) and emma at r4 won't do better than iceman at r5 and taking her to r5 would take you extra resources.

MegaGalactic

I would pick Thing or Iceman.

Mathking13

Iceman (R4 to R5) - unduped

Emma Frost is most efficiently played when you're in Telepath Form as much as possible, which results in no immunities. But yeah she's okay as a double immunities champion...
Thing is not Poison Immune.
I'd personally choose Iceman (with Vision AoU in a close second imo), but really there are a lot of other better double immunity champions. Key among them being Sentinel and Darkhawk.
Still, I'd recommend taking one of those double immunities champions up; you won't regret it.