So i only need to invest 10 points into wits then, i think i will sacrifice a bit of my summoner damage to get the wits
No, you only need to invest about 3-5 points into Wits and then have Peace of Mind cast onto you. In this game, all attributes start at 10, you get 2 points to spend each level and you can have a maximum of 40 points in total invested into an attribute before you can't put in any more (bonuses from other sources can take you above the cap).
