Will try the molten gem. Seems interesting. Tried like 10 runs with cold and in my experience it feels contrary to what you describe. More squishy, and damage its just not there compared to Arcane (feels like 50% less damage). It takes doble the time to kill elite/champ with cold but it seem to be more consistent vs RG. My cold gear is not different from arcane so its not like I´m losing lots of damage…it just feels weaker. And yet …can´t beat 149. I managed 148 (Star Pact) with no problem with only BOtT gem and both defensive gems, no deaths. But had problems mantaining Squirt´s bonus. The main problem seems to be killing RG…I just realized that it took like 3min (in GR149)!
Any help appreciated. Will try all recommendations. Thx