PoE Toxic Rain, Aranthar builds

My SSF TR Trickster is level 78 and just getting into Yellow maps. I'm working on farming a 6L via Porcupine cards, but w/out favored map slots that is slow going, so for now I'm on a 5L. My biggest question is about what node wheels/areas to focus on. I also have a Cluster gem that could be good, although I'm not 100% sure it is worthwhile. PoB: Profile: Questions: 1) The Duration Mast