Originally Posted by
dkyle
Increasing your bonus SP stat (in a Pali's case, WIS) does not increase available SP. It only increases the max SP. Since buffs such as Owl's Wisdom go away when zoning in, or shrining, they are useless for gaining SP. Those pots are only good for getting your WIS high enough to be able to cast.
Find a Power or Wizardry item, and wear that to increase your max SP. You might get a scepter of Power or Wizardry, for example, equip it before shrining, use the sp to buff, then swap in your weapon.