Hey Phaneron,
I can't speak to this with any degree of certainty, because I just re-started the game myself after a few years. I chose the Blade Vortex fire conversion assassin build, but I don't know if i'm doing that right either. Let me know how yours goes, i'd love to know.
-Thyrd
edit: Jaywalker put some good advice and linked 2 builds on this thread, similar question to yours:
https://forums.d2jsp.org/topic.php?t=83383110&f=110This post was edited by thyrd_light on Jul 25 2020 12:40pm