Sammael
Adventurer
System mastery was built into 3.0 from the get go. Monte Cook explained it very clearly, and gave examples. It just took people a month or two to "figure it out."
And guess what? 4E is exactly the same. I ran a 4E adventure at a local game day a couple of weeks ago, with pre-gen PCs. It took one of the players, who is a natural powergamer, less than half an hour to figure out at least one broken combo for every other PC. And he only played 4E once or twice before! Breaking a game doesn't require a Pun-Pun level of munchkinism. Most of it is just mathematical reasoning.
And guess what? 4E is exactly the same. I ran a 4E adventure at a local game day a couple of weeks ago, with pre-gen PCs. It took one of the players, who is a natural powergamer, less than half an hour to figure out at least one broken combo for every other PC. And he only played 4E once or twice before! Breaking a game doesn't require a Pun-Pun level of munchkinism. Most of it is just mathematical reasoning.