The "min-max" concept aims for the late game, so if you are really going for that, don't allocate points to agility. You will eventually come across gear that fills that gap, and your buffs easily supplement it in the mean time. I would recommend wisdom, as stamina is much more quickly max'd thru buffs and equipment in Velious late game.
Wolf Fur Slippers should keep you going for a while. Once you start looking at Golden Efreeti Boots or Iksar Hide Boots, you are in the cash/ability range to get a Djarnns ring for your new agility item, if another slot isn't already giving the agility you need.
For reference, I am a 60 Barbarian shaman, and I still buff agility on myself because I feel it helps mitigate damage slightly. Don't know if its parse able, but I like it, and it's a very low resource cost.