Another redundant/meaningless SK question

[ScottBerta]

So as I attain pp through my daily toils and have a pp sink to blow it on (my 60 Iksar SK)... I’ve been struggling to decide how best to waste my pp. He currently uses will of innoruk bp, ralgyn’s promise quest (head). I guess my question is would it be more beneficial to try and attain a Vindi bp or Crown of Narandi?

As a secondary question is Cloak of Confusion that much better than Hierophant cloak?

And is ring 9 really worth trying to get?

Any input is appreciated. Thanks.

Atreo 60 SK