All mobs give Reputation to Cenarion Expedition through Exalted. Rep Given: Trash: 12, 2 (non-elite), Bosses: 120, Full clear 1,662 rep. (1,782 if you take the time to kill all of the slaves as well.) The fastest path through the instance nets ~1100 rep. In Heroic Mode, the fastest path gives roughly 1550 rep, and a full clear will give 2,559 rep. The instance can be soloed in normal mode at lvl 80. Heroic Mode can even be soloed by lvl 80 plate dps.