I was in Broken Valley - around level 11 when I restarted the game in Hard Mode. Normal was getting too easy. Now, I was wondering whether I should invest in Wisdom and Mindreading this time at all- both were 4/5 when I was playing in Normal.
The problem is not skill points. I had plenty. But as I read in the forums, the game gets very easy after level 30. So if I get there faster, combat would get boring faster, right?

I do all quests and kill every monster on map. So, without Wisdom / Mindreading, I may be 32-33 at the end of the game, right? So, should I invest in them at all?
Also, on a different topic, what is the maximum level of Lockpicking? 5?
Thanks in advance.