I've heard good things for DPS-race bits where people pop Str/Dex and get 5 skills out of them.
as far as Int/Mnd perhaps if you use it when you summon your pet as Smn/Sch (so they have the stat bonus, I've heard it's stat snapshot like DoTs), but I can't see using them with after GCD effect skills being very effective.

I just couldn't ever see myself using a VIT/PIE bonus since giving bonus VIT doesn't give the HP that matches it just ups your health pool so you'd have to be cured up to it for it to matter