I don't think engineers have access to better guns. Flamethrowers, yes. But the guns will be the same as thieves or mesmers.
Also, for Erasmus's sake...
Anyone can rez anyone else in GW2. In GW1, anyone could provided they took a rez. That's true if you die of a meteor to the head, or eaten by the undead, or something. But not old age. Somehow, you can't rez someone from old age.