Notes:

General idea here was to keep within the transitional chain of Frieza's transformations, finding a logical next stage from Frieza's final form that looked unique but also "simple". I imagined Frieza molting all the white of his final form like a reptile shedding its skin, ending up nearly all shiny purple like a being made of crystal. No protruding ears, no tail, reduced number of toes, just shedding all access body armor to allow a lighter form that puts out higher energy output, possibly becoming a "glass cannon" as a result but because power output would be so high it would indeed take more than a "God" to even take advantage of the drop in defense weakness.