I am currently in full viper gear, and I know the standad sigil choices is sigil of malice and sigil of geomancy. My poison is at 100% duration, Torment is at 97.19%. But I could not see a listing for burning, so i tried to replace geomancy with smoldering. Then burning showed up at 97.19% on the screen. So my standard burning must be 20% lower. So I wonder, does geomancy really outclass longer burning? Especially since it benefits both our searing fissure and diabolic inferno.