For PMC, the socket bonuses suck, so I'd just go healing/spirit. Once you get pieces that have some decent socket bonuses (+healing, +regen, or +spirit), then I'd go with healing/spirit in reds and blues, and healing/int in yellows, until you find yourself wanting on either more regen or more healing (where blues become straight spirit, or reds because straight healing).
And yea, I wouldn't worry about haste until you're trying to decide how to socket T6.