<3 Ming Poison Assassin -- BV Mapper / Arcanist Brand BFBB Bosser

Vaal Blade Vortex

Assassin BV League Start (or just Poison w/o Nightblade concepts)

Unbound Ailments

Cold DoT Trickster Fan Club (No Occultists Allowed)

Wintertide Brand

20Mil DPS BV Assassin on 10-15ex Budget

Poison Detonate Dead Occultist - A boss destroyer

How can i make this build any better?

Good Poison DPS numbers

[3.16] CoC Poison Detonate Dead Assassin

Poison Exsanguinate Trickster

Poison Blade Blast Assassin is still a solid well-rounded build