https://warren1001.github.io/IAS_Calculator/This calculator is said to be quite reliable.
So with LoH and WF +, 2x IAS jewel, you're at 70ias (the 6th bpoint). Next breakpoint is 80, so another IAS jewel achieves that. To min-max, imo u should drop gskull, strength doesn't help compared to Dex, and you already have KB on bow. At least get a rare circlet with 2 Amazon 2s with adds. The other options (even protector with 2ias rare circlet Vs 3ias blue circlet), they all have they're own trade offs and not necessary better than the other.
Example, with burst of speed proc from hustle, you reach a couple more bpoints, but sacrifice cta and have to constantly swap to proc which can be annoying to some, but others find it workable. It's ultra glass cannon.
You choose your poison.