Property is shared with Trinity, Nezha and Yareli too, so they’re all super tanky. Yareli with a Fortifier Akarius is kind of hilariously braindead. According to the wiki, Nidus benefits as well.
One thing I realised, because of how complete Nekros’s kit is, he has a lot of room to mess around with different helminths. I’ve been having fun with Thermal Transfer, although sadly it doesn’t apply to summons.
I’d say it’s tied between Excal and Atlas, Chromatic Blade + Furious Javelin is already a bonkers setup, and Slash Dash inheriting exalted arcanes is just… boy. Same playstyle concept, be invincible and zap your enemies.