My variant of Poison Spark with moderate investment, intended to be somewhat tanky.

I've completed all Uber encounters except for Cortex and Exarch (didn't have the set at the time) without Mageblood and Melding of the Flesh.

For those unfamiliar with the build, besides Phantasmal Spark, Anomalous Blood & Sand and Divergent HoAg, Ashes of the Star is required, or the build will not function (in terms of dps).

PoB: https://pastebin.com/BY85MRSd