75% IAS would be the breakpoint. So you will need 45% extra IAS in addition to the 30% from Kingslayer.melianor said:ABOUT IAS:
Kingslayer already has 30% IAS inherent. So when you say 45% IAS in your table does that mean, that those 45% are the additional IAS you need, or do you just need to reach the 45% by adding up on the 30% IAS from Kingslayer?
I quickly tried this build in single player with an editor and it's quite doable, even in HC. I had some troubles at first, but eventually I found a set-up that I really liked and will start building it asap.