^jedi_d made a rimetongue purifier which could take farm pre-FG 170 without any greens IIRC.
I guess the TL;DR takeaway of my very subjective opinion is…
IF 1 or 2 cold sets are indeed overperforming, then sure. Nerf them. But by and large, cold damage needs some lovin’. Rimetongue and Harra comes to mind.
Chaos damage needs better skills. I messed around with voidsoul aegis, and it was garbage.