Along with scraping my jaw off the floor, I picked up my first ever Death’s Web (2/44) from a normal Oblivion Knight in Chaos Sanctuary. I’ve been playing off and on since Diablo 2 was released.
According to silospens drop calc with 1 player/330 MF, it’s about a 1 in 5.5 million chance.
All that’s left on the first find list is The Cranium Basher, Mang Song’s Lesson, a Crown of Ages and Tyrael’s Might. 