Asymmetric combat in D&D 4E

In the 4th edition Dungeons & Dragons campaign I am currently running the group spent level 1 fighting kobolds and zombies. Now at level 2 they got into combat with humans for the first time. Now in previous editions of Dungeons & Dragons you would have created a level 2 human bandit using the same rules as for creating a player character. You'd declare him to be a fighter or rogue, and give him stats and abilities accordingly. 4th edition doesn't work like that any more, there you

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