Ferok pretty much hit the nail on the head. I can mostly only speak from melee experience, but ...
IMO Priorities are:
Haste for melee, no exceptions. Seriously.
[You must be logged in to view images. Log in or Register.]
SoW & Sta or AC to puller
Sta & AC (or agility if no components for skin) to Tank
Sta to necros for their hp->mana converts
Lesser Priorities (I.e. when mana permits)
Str & Dex to Melees
Haste to pets??? I don't recall if pet classes get their haste in classic.
Agility to Melees, the small AC boost does help, Monks benefit from this most??