POB:
https://pastebin.com/rY7vcupn
https://poe.ninja/pob/SQp
Curse changes are good for Poisonous Concotion, easier to hit DoT cap these days. Quite a generic PC build but you can definitely make this a fantastic uber boss killer.
Other videos:
Uber Sirus ~10 second kill: https://youtu.be/DtfsTidggW4
Uber Sirus full fight @ level 95 (old video and POB): https://youtu.be/ZYNWtNrcEr8