ACT 6.1 Advice

Looking for some advice on whether I should push for cavalier. I've only completed 6.1.1 so far.
My roster is
Duped R5 Cap IW Sig 160
R4 Emma Frost
R4 Killmonger
R4 Hulk Rag
R3 Iron man IW
R3 Domino
R3 Massacre
R3 Duped Archangel Sig 35
6star R1 Thor Jane
6star R1 Gambit
I also have enough material to R4 either Domino, Archangel or Ironman IW
Please advise on whether I should R4 anyone and if my current roster is good enough to make it worth pushing through 6.1 with some units spend
Thanks
My roster is
Duped R5 Cap IW Sig 160
R4 Emma Frost
R4 Killmonger
R4 Hulk Rag
R3 Iron man IW
R3 Domino
R3 Massacre
R3 Duped Archangel Sig 35
6star R1 Thor Jane
6star R1 Gambit
I also have enough material to R4 either Domino, Archangel or Ironman IW
Please advise on whether I should R4 anyone and if my current roster is good enough to make it worth pushing through 6.1 with some units spend
Thanks
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