Think about it, 50-70 damage in a charge to 1 enemy. Fireball 20 ft radius 40 feet across not exatc mind you but you can hit 40 enimies with it. Last night I had an encounter with 25 undead. party wizard pulls out fire ball. 18 damage (3 less than avg.) that is 475 damage. min would be 150 max 900 in 1 round. It's not broke, it's just fine! If he uses the charge wisely then it should be fine. If it is penelizing other players have an oger eat his rations and make him roll sruvivle checks.
