Okay, so there is a new bugged IAs calculator out there now.
https://warren1001.github.io/MrLlamaSCStreamInfo/IAS%20Calculator/After looking at all the weapons available and different ias, oias, and sias settings, it does indeed point to either etomb or ebotd
I did however notice that rather than archon staff, I believe an eth orge maul would be the best base. Not only do the mauls do an additional 150% Dmg to Undead, but they get "for every 100 points in strength 110% of the weapon damage is added (compared to 100% in all other cases). Only three items in the game, all blunt weapons, have this bonus damage property."
Quote (smykster @ Nov 12 2021 07:48pm)
I just got my hands on a Eth Archon Staff. Has any more testing been done for this? Should I socket quest this thing to try this out?
Yes, that set up would bring the breakpoint to 4.6. 75 gear ias on this setting would be 4.4, althought I dunno how these calculate into a 4/4/4/4/x view