I ran that build, but differences is my channel skill was disintegrate (intensify) since it buffs your twister damage on each mob you hit, and I used unwavering will instead of unstable anomaly, with my reasoning being I'd rather having more damage/mitigation almost always instead of a skill that just delays your death a few seconds until you re-die in a bad situation.
Other than that, just make sure you're making heavy use of teleport to constantly blink around the area out of danger. I will say I still prefer orbit for higher rifts because it's far more tanky, and it's very consistent. Solo twister is extremely variable about how it performs depending on your rift density, room geography, and mob types.