You are not more likely to get Oculus than any of the items above. Shako is the only item in that list that you're likely to have as an endgame goal, and it's obtainable in nightmare. Most of those aren't endgame items, understanding endgame as 'permanent wear goal items'. Seriously, a BS has a +5 STR requirement over a Crystal Sword, you're going to spend those hard points regardless. Yet for some reason, this is an idea that I both see people share in forums + an attitude I see from players in early-midgame, where they race for gray Crystal Swords in 4 socket max areas and inexplicably leave Broad Swords on the ground. There isn't even a guarantee that you'll be able to drive your hard STR investment below a Broad Sword's req. Only endgame do characters get to slash their STR investment, at which point you're not even going to be wearing a Spirit. Typically Monarch requires you to outinvest every single one of those breakpoints regardless. Shako has a higher STR requirement than a Broad Sword, not to mention things like War Travs, Tal's Armor, an upped Goldwrap, or even a run of the mill Mage Plate. There is a very popular idea that 'you should get a Crystal Sword for the lower strength requirement' when making Spirit which has never made sense: you will be forced to invest more points in strength than a Broad Sword requires in order to wear common equipment goals.

Diablo 2 crystal sword 4 sockets