I played and finished the entire game
At no point did I feel Mindread rebates would have helped much. If anything, the few XP you spend easily was recouped by the skill and stat points earned.
As for wisdom, it's so little you get that a few extra kills easily would make up the difference. You can spend more than lvl5 on wisdom? Wow, what an incredible waste of skill points. I only raised my damage skills above level 10.
