What do guild skills do?
Well besides the obvious (giving you bactstab/swindle or berserk or hypnotize) there are some bonuses to getting them even though you may think it only takes away two points from two of your stats. Getting a warrior skill adds a point to your attack permanently for each one you get. Also, for every 4 warrior skills you get an extra use in battle. And, after getting 4 warrior skills you no longer sleep late, you no longer get sick when you begin questing, and you no longer take damage when you awake to go questing. Trader skills add one point to your defense. Trader skills will give you an extra use in battle for every 5 of them that you get. Also, after getting 4 trader skills you’ll start to escape battles better, because you “hide”. Mage skill don’t do much, the lets you use gems and they’ll give you an extra battle use for every 6 mage skills you get.