Jake's murder.
Shutting down Sparkmaster 5000 without a fight.
The elemental riddle north of Cysael.
I'll admit that I just charged in and wrecked the Sparkmaster, but as for the other two, how are they smart puzzles? Jake's murder is a series of steps which involve basically speaking to everyone you meet and exploring everything. As for the elemental riddle, do you mean the statues? That's one of the most obvious "puzzles" in the game.
