Spot/Disarm Traps (boring title, I know)

First of: Hi, I'm Aquarius and this is my first post! Wohoo!

Now let's get down to business. I've played through the game a few times before, but never played a thief. So now I'm trying to plan out what I'm going to points in (I'm a obsessive perfectionist when it comes to RPG :x ) and I was wondering if it's worth putting points in Spot/Disarm Traps? As I said before I've never played a thief before and haven't had anything to do with traps, but still survived very well.

Are those two skills basically useless?

 

Spot traps is useful but nowhere near essential provided you have enough health.

Disarm traps is useless unless you have spot traps. - But its probably better to learn either unlocking cantrip or getting yourself the "trap springer" tech thing that gets you by traps.