Description: Able to set level 1-10 traps.
Comment: Setting up traps is useful at the beginning when you develop the warrior skills and you want to inflict as much damage to enemy as possible before he comes near to you.
Description: +5-50% speed in sneak mode.
Comment: Skill is not used later on in the game, because there are not so many enemies that turn their backs on you.
Description: Death Strike can be executed from 1.6-2.5m.
Comment: As above - encountering an enemy who's turned back to us is very difficult, mostly we will fight face to face.
Description: Lockpicking time increased by 1-10s. Chance for Auto-lockpick success increased by 2-20%.
Comment: It is worth to invest in this skill, it makes opening difficult locks in chests containing valuable items much easier.
Description: Stealing time increased by 1-10s.
Comment: Theft is only useful at the very early stage of the game, when the purse is almost completely empty.
The numbers marked in green, which can be found in the table above, represent the skill level (from level 1 to 10).
What is worth investing
The first three skills: Trapper, Sneak and Death Strike are completely useless in the game (apart from the very beginning, where we are forced to use them in the tutorial). The Locksmith skill is worth investing more points in, because through this we are able to open difficult locks and gain more valuable items (which we can sell later earning lots of auras). I do not recommend developing Thievery - at the beginning it might be helpful in earning a bit of auras, however it's completely unprofitable at a longer term.