Been awhile and I cant remember...

[Brista]

You need ilvl 75 for cruel so a drop from a monster that would be level 9 or higher (about the Tamoe Highlands onwards I think). Blood Raven is level 10+66 in Hell so she would drop a high enough ilvl

Monster levels can be checked here
http://www.lurkerlounge.com/spirea/Monster...rs/Levels.shtml
Add 3 for bosses and 2 for champs

The item level = the level of the monster dropping it

Affix levels can be checked here
http://www.diabloii.nu/affixcalc/

Adeyke is right, it's 100% of ilvl for this recipe