Assassin build... recommendations

[Aetherlock]

So I am a returning player after a long time. Havent played since Immortal throne released. I upgraded to Anniversary edition and have all DLC. Looking for a good build for assassin that uses dual throwing weapons. I have gotten the build to level 63 and am about half way through Epic using the Loot+XmaxFTW mod. I want to stay mostly Pierce/Poison damage. I have seen lots of builds online (youtube) that dual wield daggers or swords but nothing thrown. I am also using Calculated strike instead of Onslaught for the Pierce/physical damage bonuses. Should I switch to Onslaught instead?
I currently have dual skeleton darts with Epic Venom sacs. Other gear is just what I could find exploring so far (Garb of the scorpion king, chaosbane gauntlets from that set, Epius greaves, Dwarven bone fetish ammy, Insulated jade band rings x2, shroud of eternal night artifact and hallowed Alcyoneus mask helm.
As I finish Epic and work towards Legendary, what items/gear should I be looking out for or farming (I already know about Stonebinders cuffs)? Right now I do about 2-2.8K DPS but feel pretty squishy since I dont have high res in anything except Lightning (68%) and Vitality (100% +) everything else is under 30%. So right now I have plus 3 to Rogue mastery skills via gear and Plus 1 to all skills via the prefix on the Helm. Which is why I went Calculated strike instead of Onslaught.
Any help or links to builds, especially with explanations as to why certain items were chosen would be great. TIA