Anything with hit or expertise on it will have those values changed to crit or haste, with crit being prioritized unless crit already exists on the item. So an item with hit/crit will have the hit converted to an equal amount of haste. An item with haste/expertise will have the expertise converted to an equal amount of crit. Items like Lenses, Unearthed Bands, Gnomer Rings, will all have their randomly rolled stats adjusted too.
'Of the Tiger' will be agi/crit in most cases.