When going Charr-hunting in The Northlands (a popular activity among high-level and "permanently-in-pre-Searing", or perma-pre, characters), bring him along as he can be quite helpful since he adds to the party size. He can often tank one or two Charrs at a time thanks to his moderate Armor and excellent use of Troll Unguent.
Keep in mind that foes will not drop loot for the party if Ben deals most of the damage to that foe, since his base damage is fairly high for his level, though the party will gain full experience for the kill as usual.
He can actually level up if much foes have been slain and the party size is 1 (i.e. solo).
He will not spawn if the mentioned quest is inactive or completed.