[Radek]

As we all know, not every skill works equally efficiently for every class. The well known level 12 lock in the Skull Castle can demonstrate this behavour: for a thief class (barbarian, assassin, etc.) with Traps and Locks 12, the lock is "moderate" and the character will almost always pick it. For a non-thief class (zenmaster, samurai, etc.) with Traps and Locks 12, the lock is "difficult" and the character will almost always fail to pick it.
I have seen another such behaviour recently: a ranger with a Healer trait behaves as if he did not have the trait. The Heal spell cast by a ranger healer usually heal 5-7 HP. Other classes known to me can heal more than 20 HP by casting a Heal spell with the Healer trait. If you switch from a ranger to another class, the Healer trait begins to work.
Also, I do not have a good experience with a zenmaster using daggers. Daggers seem to ignore Heroic Might, Bloodlust and similar damage boosting tools.

Can anybody put an order in it? Which traits do not work or do not work well for which classes? Which weapons are a good choice and which weapons are a bad choice for a particular class? Which skills work with penalties for which classes? The Scroll of Misinformation says cryptically that "STR increases damage inflicted by SOME weapons. By which ones? Any piece of information would be highly appreciated. Please, post also results of your experience even if you aren't sure about the thing.